mirror of
https://github.com/sudo-project/sudo.git
synced 2025-08-22 01:49:11 +00:00
Move symbol visibility checks to m4/visibility.m4
This commit is contained in:
Todd C. Miller
parent
5bf5a4e26c
commit
ea5668086c
1
MANIFEST
1
MANIFEST
@ -434,6 +434,7 @@ m4/lt~obsolete.m4
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m4/python.m4
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m4/runlog.m4
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m4/sudo.m4
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m4/visibility.m4
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pathnames.h.in
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plugins/audit_json/Makefile.in
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plugins/audit_json/audit_json.c
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1
aclocal.m4
vendored
1
aclocal.m4
vendored
@ -27,3 +27,4 @@ m4_include([m4/lt~obsolete.m4])
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m4_include([m4/python.m4])
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m4_include([m4/runlog.m4])
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m4_include([m4/sudo.m4])
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m4_include([m4/visibility.m4])
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154
configure
vendored
154
configure
vendored
@ -31602,81 +31602,6 @@ fi
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;;
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esac
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the linker accepts -Wl,--allow-multiple-definition" >&5
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printf %s "checking whether the linker accepts -Wl,--allow-multiple-definition... " >&6; }
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if test ${ax_cv_check_ldflags___Wl___allow_multiple_definition+y}
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then :
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printf %s "(cached) " >&6
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else case e in #(
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e)
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ax_check_save_flags=$LDFLAGS
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LDFLAGS="$LDFLAGS -Wl,--allow-multiple-definition"
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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int
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main (void)
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{
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_link "$LINENO"
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then :
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ax_cv_check_ldflags___Wl___allow_multiple_definition=yes
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else case e in #(
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e) ax_cv_check_ldflags___Wl___allow_multiple_definition=no ;;
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esac
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.beam \
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conftest$ac_exeext conftest.$ac_ext
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LDFLAGS=$ax_check_save_flags ;;
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esac
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_ldflags___Wl___allow_multiple_definition" >&5
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printf "%s\n" "$ax_cv_check_ldflags___Wl___allow_multiple_definition" >&6; }
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if test x"$ax_cv_check_ldflags___Wl___allow_multiple_definition" = xyes
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then :
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if test ${LDFLAGS+y}
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then :
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case " $LDFLAGS " in #(
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*" -Wl,--allow-multiple-definition "*) :
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{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : LDFLAGS already contains -Wl,--allow-multiple-definition"; } >&5
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(: LDFLAGS already contains -Wl,--allow-multiple-definition) 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; } ;; #(
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*) :
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as_fn_append LDFLAGS " -Wl,--allow-multiple-definition"
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{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : LDFLAGS=\"\$LDFLAGS\""; } >&5
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(: LDFLAGS="$LDFLAGS") 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }
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;;
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esac
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else case e in #(
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e)
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LDFLAGS=-Wl,--allow-multiple-definition
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{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : LDFLAGS=\"\$LDFLAGS\""; } >&5
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(: LDFLAGS="$LDFLAGS") 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }
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;;
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esac
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fi
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else case e in #(
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e) : ;;
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esac
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fi
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if test -n "$GCC"; then
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -fvisibility=hidden" >&5
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@ -32004,6 +31929,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
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conftest$ac_exeext conftest.$ac_ext
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CFLAGS="$_CFLAGS"
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LDFLAGS="$_LDFLAGS"
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rm -f conftest.map
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;;
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esac
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@ -32053,6 +31979,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
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conftest$ac_exeext conftest.$ac_ext
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CFLAGS="$_CFLAGS"
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LDFLAGS="$_LDFLAGS"
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rm -f conftest.map
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;;
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esac
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@ -32114,6 +32041,83 @@ printf "%s\n" "$sudo_cv_var_hpux_ld_symbol_export" >&6; }
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esac
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the linker accepts -Wl,--allow-multiple-definition" >&5
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printf %s "checking whether the linker accepts -Wl,--allow-multiple-definition... " >&6; }
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if test ${ax_cv_check_ldflags___Wl___allow_multiple_definition+y}
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then :
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printf %s "(cached) " >&6
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else case e in #(
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e)
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ax_check_save_flags=$LDFLAGS
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LDFLAGS="$LDFLAGS -Wl,--allow-multiple-definition"
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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int
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main (void)
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{
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_link "$LINENO"
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then :
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ax_cv_check_ldflags___Wl___allow_multiple_definition=yes
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else case e in #(
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e) ax_cv_check_ldflags___Wl___allow_multiple_definition=no ;;
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esac
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.beam \
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conftest$ac_exeext conftest.$ac_ext
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LDFLAGS=$ax_check_save_flags ;;
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esac
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_ldflags___Wl___allow_multiple_definition" >&5
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printf "%s\n" "$ax_cv_check_ldflags___Wl___allow_multiple_definition" >&6; }
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if test x"$ax_cv_check_ldflags___Wl___allow_multiple_definition" = xyes
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then :
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if test ${LDFLAGS+y}
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then :
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case " $LDFLAGS " in #(
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*" -Wl,--allow-multiple-definition "*) :
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{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : LDFLAGS already contains -Wl,--allow-multiple-definition"; } >&5
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(: LDFLAGS already contains -Wl,--allow-multiple-definition) 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; } ;; #(
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*) :
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as_fn_append LDFLAGS " -Wl,--allow-multiple-definition"
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{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : LDFLAGS=\"\$LDFLAGS\""; } >&5
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(: LDFLAGS="$LDFLAGS") 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }
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;;
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esac
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else case e in #(
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e)
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LDFLAGS=-Wl,--allow-multiple-definition
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{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : LDFLAGS=\"\$LDFLAGS\""; } >&5
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(: LDFLAGS="$LDFLAGS") 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }
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;;
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esac
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fi
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else case e in #(
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e) : ;;
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esac
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fi
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if test "$enable_sanitizer" != "no"; then
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as_CACHEVAR=`printf "%s\n" "ax_cv_check_cflags__$enable_sanitizer" | sed "$as_sed_sh"`
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts $enable_sanitizer" >&5
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139
configure.ac
139
configure.ac
@ -4568,149 +4568,14 @@ case "$OS" in
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;;
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esac
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SUDO_SYMBOL_VISIBILITY
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dnl
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dnl For fuzz_policy we redefine getaddrinfo() and freeaddrinfo(), but
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dnl this can cause problems with ld.lld when sanitizers are enabled.
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dnl
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AX_CHECK_LINK_FLAG([-Wl,--allow-multiple-definition], [AX_APPEND_FLAG([-Wl,--allow-multiple-definition], [LDFLAGS])])
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dnl
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dnl Check for symbol visibility support.
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dnl This test relies on AC_LANG_WERROR
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dnl
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if test -n "$GCC"; then
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AX_CHECK_COMPILE_FLAG([-fvisibility=hidden], [
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AC_DEFINE(HAVE_DSO_VISIBILITY)
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AX_APPEND_FLAG([-fvisibility=hidden], [CFLAGS])
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LT_LDEXPORTS=
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LT_LDDEP=
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])
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else
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case "$host_os" in
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hpux*)
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AX_CHECK_COMPILE_FLAG([-Bhidden_def], [
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# HP-UX cc may not allow __declspec(dllexport) to be
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# used in conjunction with #pragma HP_DEFINED_EXTERNAL
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# when redefining standard libc functions.
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AC_CACHE_CHECK([whether __declspec(dllexport) can be used when overriding libc functions],
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[sudo_cv_var_hpux_declspec_libc_function],
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[
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_CFLAGS="$CFLAGS"
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CFLAGS="${CFLAGS} -Bhidden_def"
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
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__declspec(dllexport) char * getenv(const char *n) { return NULL; }]])], [
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sudo_cv_var_hpux_declspec_libc_function=yes
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], [
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sudo_cv_var_hpux_declspec_libc_function=no
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])
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CFLAGS="$_CFLAGS"
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]
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)
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if test "$sudo_cv_var_hpux_declspec_libc_function" = "yes"; then
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AC_DEFINE(HAVE_DSO_VISIBILITY)
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AX_APPEND_FLAG([-Bhidden_def], [CFLAGS])
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LT_LDEXPORTS=
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LT_LDDEP=
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fi
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])
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;;
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solaris2*)
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AX_CHECK_COMPILE_FLAG([-xldscope=hidden], [
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AC_DEFINE(HAVE_DSO_VISIBILITY)
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AX_APPEND_FLAG([-xldscope=hidden], [CFLAGS])
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LT_LDEXPORTS=
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LT_LDDEP=
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])
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;;
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esac
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fi
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dnl
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dnl Check whether ld supports version scripts (only GNU and Solaris ld).
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dnl If possible, we use this even if the compiler has symbol visibility
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dnl support so we will notice mismatches between the exports file and
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dnl sudo_dso_public annotations in the source code.
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dnl This test relies on AC_LANG_WERROR
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dnl
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if test "$lt_cv_prog_gnu_ld" = "yes"; then
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AC_CACHE_CHECK([whether ld supports anonymous map files],
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[sudo_cv_var_gnu_ld_anon_map],
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[
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sudo_cv_var_gnu_ld_anon_map=no
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cat > conftest.map <<-EOF
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{
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global: foo;
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local: *;
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};
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EOF
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_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $lt_prog_compiler_pic"
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_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -fpic -shared -Wl,--version-script,./conftest.map"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]], [[]])],
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[sudo_cv_var_gnu_ld_anon_map=yes])
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CFLAGS="$_CFLAGS"
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LDFLAGS="$_LDFLAGS"
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]
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)
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if test "$sudo_cv_var_gnu_ld_anon_map" = "yes"; then
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LT_LDDEP="\$(shlib_map)"; LT_LDEXPORTS="-Wl,--version-script,\$(shlib_map)"
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fi
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else
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case "$host_os" in
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solaris2*)
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AC_CACHE_CHECK([whether ld supports anonymous map files],
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[sudo_cv_var_solaris_ld_anon_map],
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[
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sudo_cv_var_solaris_ld_anon_map=no
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cat > conftest.map <<-EOF
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{
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global: foo;
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local: *;
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};
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EOF
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_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $lt_prog_compiler_pic"
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_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -shared -Wl,-M,./conftest.map"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]], [[]])],
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[sudo_cv_var_solaris_ld_anon_map=yes])
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CFLAGS="$_CFLAGS"
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LDFLAGS="$_LDFLAGS"
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]
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)
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if test "$sudo_cv_var_solaris_ld_anon_map" = "yes"; then
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LT_LDDEP="\$(shlib_map)"; LT_LDEXPORTS="-Wl,-M,\$(shlib_map)"
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fi
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;;
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hpux*)
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AC_CACHE_CHECK([whether ld supports controlling exported symbols],
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[sudo_cv_var_hpux_ld_symbol_export],
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[
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sudo_cv_var_hpux_ld_symbol_export=no
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echo "+e foo" > conftest.opt
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_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $lt_prog_compiler_pic"
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_LDFLAGS="$LDFLAGS"
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if test -n "$GCC"; then
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LDFLAGS="$LDFLAGS -shared -Wl,-c,./conftest.opt"
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else
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LDFLAGS="$LDFLAGS -b -Wl,-c,./conftest.opt"
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fi
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]], [[]])],
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[sudo_cv_var_hpux_ld_symbol_export=yes])
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CFLAGS="$_CFLAGS"
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LDFLAGS="$_LDFLAGS"
|
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rm -f conftest.opt
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]
|
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)
|
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if test "$sudo_cv_var_hpux_ld_symbol_export" = "yes"; then
|
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LT_LDDEP="\$(shlib_opt)"; LT_LDEXPORTS="-Wl,-c,\$(shlib_opt)"
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fi
|
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;;
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esac
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fi
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dnl
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dnl Check for -fsanitize support
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dnl This test relies on AC_LANG_WERROR
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140
m4/visibility.m4
Normal file
140
m4/visibility.m4
Normal file
@ -0,0 +1,140 @@
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AC_DEFUN([SUDO_SYMBOL_VISIBILITY], [
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dnl
|
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dnl Check for symbol visibility support.
|
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dnl This test relies on AC_LANG_WERROR
|
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dnl
|
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if test -n "$GCC"; then
|
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AX_CHECK_COMPILE_FLAG([-fvisibility=hidden], [
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AC_DEFINE(HAVE_DSO_VISIBILITY)
|
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AX_APPEND_FLAG([-fvisibility=hidden], [CFLAGS])
|
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LT_LDEXPORTS=
|
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LT_LDDEP=
|
||||
])
|
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else
|
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case "$host_os" in
|
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hpux*)
|
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AX_CHECK_COMPILE_FLAG([-Bhidden_def], [
|
||||
# HP-UX cc may not allow __declspec(dllexport) to be
|
||||
# used in conjunction with #pragma HP_DEFINED_EXTERNAL
|
||||
# when redefining standard libc functions.
|
||||
AC_CACHE_CHECK([whether __declspec(dllexport) can be used when overriding libc functions],
|
||||
[sudo_cv_var_hpux_declspec_libc_function],
|
||||
[
|
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_CFLAGS="$CFLAGS"
|
||||
CFLAGS="${CFLAGS} -Bhidden_def"
|
||||
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
|
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__declspec(dllexport) char * getenv(const char *n) { return NULL; }]])], [
|
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sudo_cv_var_hpux_declspec_libc_function=yes
|
||||
], [
|
||||
sudo_cv_var_hpux_declspec_libc_function=no
|
||||
])
|
||||
CFLAGS="$_CFLAGS"
|
||||
]
|
||||
)
|
||||
if test "$sudo_cv_var_hpux_declspec_libc_function" = "yes"; then
|
||||
AC_DEFINE(HAVE_DSO_VISIBILITY)
|
||||
AX_APPEND_FLAG([-Bhidden_def], [CFLAGS])
|
||||
LT_LDEXPORTS=
|
||||
LT_LDDEP=
|
||||
fi
|
||||
])
|
||||
;;
|
||||
solaris2*)
|
||||
AX_CHECK_COMPILE_FLAG([-xldscope=hidden], [
|
||||
AC_DEFINE(HAVE_DSO_VISIBILITY)
|
||||
AX_APPEND_FLAG([-xldscope=hidden], [CFLAGS])
|
||||
LT_LDEXPORTS=
|
||||
LT_LDDEP=
|
||||
])
|
||||
;;
|
||||
esac
|
||||
fi
|
||||
|
||||
dnl
|
||||
dnl Check whether ld supports version scripts (most ELF linkers).
|
||||
dnl If possible, we use this even if the compiler has symbol visibility
|
||||
dnl support so we will notice mismatches between the exports file and
|
||||
dnl sudo_dso_public annotations in the source code.
|
||||
dnl This test relies on AC_LANG_WERROR
|
||||
dnl
|
||||
if test "$lt_cv_prog_gnu_ld" = "yes"; then
|
||||
AC_CACHE_CHECK([whether ld supports anonymous map files],
|
||||
[sudo_cv_var_gnu_ld_anon_map],
|
||||
[
|
||||
sudo_cv_var_gnu_ld_anon_map=no
|
||||
cat > conftest.map <<-EOF
|
||||
{
|
||||
global: foo;
|
||||
local: *;
|
||||
};
|
||||
EOF
|
||||
_CFLAGS="$CFLAGS"
|
||||
CFLAGS="$CFLAGS $lt_prog_compiler_pic"
|
||||
_LDFLAGS="$LDFLAGS"
|
||||
LDFLAGS="$LDFLAGS -fpic -shared -Wl,--version-script,./conftest.map"
|
||||
AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]], [[]])],
|
||||
[sudo_cv_var_gnu_ld_anon_map=yes])
|
||||
CFLAGS="$_CFLAGS"
|
||||
LDFLAGS="$_LDFLAGS"
|
||||
rm -f conftest.map
|
||||
]
|
||||
)
|
||||
if test "$sudo_cv_var_gnu_ld_anon_map" = "yes"; then
|
||||
LT_LDDEP="\$(shlib_map)"; LT_LDEXPORTS="-Wl,--version-script,\$(shlib_map)"
|
||||
fi
|
||||
else
|
||||
case "$host_os" in
|
||||
solaris2*)
|
||||
AC_CACHE_CHECK([whether ld supports anonymous map files],
|
||||
[sudo_cv_var_solaris_ld_anon_map],
|
||||
[
|
||||
sudo_cv_var_solaris_ld_anon_map=no
|
||||
cat > conftest.map <<-EOF
|
||||
{
|
||||
global: foo;
|
||||
local: *;
|
||||
};
|
||||
EOF
|
||||
_CFLAGS="$CFLAGS"
|
||||
CFLAGS="$CFLAGS $lt_prog_compiler_pic"
|
||||
_LDFLAGS="$LDFLAGS"
|
||||
LDFLAGS="$LDFLAGS -shared -Wl,-M,./conftest.map"
|
||||
AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]], [[]])],
|
||||
[sudo_cv_var_solaris_ld_anon_map=yes])
|
||||
CFLAGS="$_CFLAGS"
|
||||
LDFLAGS="$_LDFLAGS"
|
||||
rm -f conftest.map
|
||||
]
|
||||
)
|
||||
if test "$sudo_cv_var_solaris_ld_anon_map" = "yes"; then
|
||||
LT_LDDEP="\$(shlib_map)"; LT_LDEXPORTS="-Wl,-M,\$(shlib_map)"
|
||||
fi
|
||||
;;
|
||||
hpux*)
|
||||
AC_CACHE_CHECK([whether ld supports controlling exported symbols],
|
||||
[sudo_cv_var_hpux_ld_symbol_export],
|
||||
[
|
||||
sudo_cv_var_hpux_ld_symbol_export=no
|
||||
echo "+e foo" > conftest.opt
|
||||
_CFLAGS="$CFLAGS"
|
||||
CFLAGS="$CFLAGS $lt_prog_compiler_pic"
|
||||
_LDFLAGS="$LDFLAGS"
|
||||
if test -n "$GCC"; then
|
||||
LDFLAGS="$LDFLAGS -shared -Wl,-c,./conftest.opt"
|
||||
else
|
||||
LDFLAGS="$LDFLAGS -b -Wl,-c,./conftest.opt"
|
||||
fi
|
||||
AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]], [[]])],
|
||||
[sudo_cv_var_hpux_ld_symbol_export=yes])
|
||||
CFLAGS="$_CFLAGS"
|
||||
LDFLAGS="$_LDFLAGS"
|
||||
rm -f conftest.opt
|
||||
]
|
||||
)
|
||||
if test "$sudo_cv_var_hpux_ld_symbol_export" = "yes"; then
|
||||
LT_LDDEP="\$(shlib_opt)"; LT_LDEXPORTS="-Wl,-c,\$(shlib_opt)"
|
||||
fi
|
||||
;;
|
||||
esac
|
||||
fi
|
||||
])
|
||||
Loading…
x
Reference in New Issue
Block a user