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use -Wl,-dead_strip on Mac, its linker doesn't know -Wl,--gc-sections

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Change-Id: Ic69d0030a46fe4753cc75da58bb2c15cf009b135
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/87023
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>
This commit is contained in:
Luboš Luňák
2020-01-18 15:44:45 +01:00
parent 0d2084e198
commit 4a93a7954e
3 changed files with 25 additions and 1 deletions
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1
config_host.mk.in
View File

@@ -318,6 +318,7 @@ export KF5_LIBS=$(gb_SPACE)@KF5_LIBS@
export KRB5_LIBS=@KRB5_LIBS@ export KRB5_LIBS=@KRB5_LIBS@
export LCMS2_CFLAGS=$(gb_SPACE)@LCMS2_CFLAGS@ export LCMS2_CFLAGS=$(gb_SPACE)@LCMS2_CFLAGS@
export LCMS2_LIBS=$(gb_SPACE)@LCMS2_LIBS@ export LCMS2_LIBS=$(gb_SPACE)@LCMS2_LIBS@
export LD_GC_SECTIONS=@LD_GC_SECTIONS@
export LD_PLUGIN=@LD_PLUGIN@ export LD_PLUGIN=@LD_PLUGIN@
@x_LDFLAGS@ export LDFLAGS=@LDFLAGS@ @x_LDFLAGS@ export LDFLAGS=@LDFLAGS@
export LFS_CFLAGS=@LFS_CFLAGS@ export LFS_CFLAGS=@LFS_CFLAGS@

23
configure.ac
View File

@@ -4062,6 +4062,29 @@ printf ("hello world\n");
fi fi
AC_SUBST(HAVE_LD_BSYMBOLIC_FUNCTIONS) AC_SUBST(HAVE_LD_BSYMBOLIC_FUNCTIONS)
LD_GC_SECTIONS=
if test "$GCC" = "yes"; then
for flag in "--gc-sections" "-dead_strip"; do
AC_MSG_CHECKING([for $flag linker support])
ldflags_save=$LDFLAGS
LDFLAGS="$LDFLAGS -Wl,$flag"
AC_LINK_IFELSE([AC_LANG_PROGRAM([
#include <stdio.h>
],[
printf ("hello world\n");
])],[
LD_GC_SECTIONS="-Wl,$flag"
AC_MSG_RESULT( found )
], [
AC_MSG_RESULT( not found )
])
LDFLAGS=$ldflags_save
if test -n "$LD_GC_SECTIONS"; then
break
fi
done
fi
AC_SUBST(LD_GC_SECTIONS)
HAVE_GSPLIT_DWARF= HAVE_GSPLIT_DWARF=
if test "$enable_split_debug" != no; then if test "$enable_split_debug" != no; then

2
solenv/gbuild/platform/com_GCC_class.mk
View File

@@ -95,7 +95,7 @@ gb_PrecompiledHeader_pch_with_obj = $(BUILDING_PCH_WITH_OBJ)
ifneq ($(BUILDING_PCH_WITH_OBJ),) ifneq ($(BUILDING_PCH_WITH_OBJ),)
# If using Clang's PCH extra object, we may need to strip unused sections, otherwise inline and template functions # If using Clang's PCH extra object, we may need to strip unused sections, otherwise inline and template functions
# emitted in that object may in some cases cause unresolved references to private symbols in other libraries. # emitted in that object may in some cases cause unresolved references to private symbols in other libraries.
gb_LinkTarget_LDFLAGS += -Wl,--gc-sections gb_LinkTarget_LDFLAGS += $(LD_GC_SECTIONS)
gb_PrecompiledHeader_pch_with_obj += -ffunction-sections -fdata-sections gb_PrecompiledHeader_pch_with_obj += -ffunction-sections -fdata-sections
# Enable generating more shared code and debuginfo in the PCH object file. # Enable generating more shared code and debuginfo in the PCH object file.
gb_PrecompiledHeader_pch_with_obj += $(PCH_MODULES_DEBUGINFO) gb_PrecompiledHeader_pch_with_obj += $(PCH_MODULES_DEBUGINFO)