drop -Wno-long-double compiler flag

new GCC compilers do not accept "obsolete and totally removed
in gcc 4.2 and later" -Wno-long-double flag

actually, it used to be Apple-only GCC extension for gcc<=3.3

Change-Id: Ied3320cbd45915682b628c99bb0a168ea4753bb7
Reviewed-on: https://gerrit.libreoffice.org/11819
Reviewed-by: Douglas Mencken <dougmencken@gmail.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

config_host.mk.in

@@ -248,7 +248,6 @@ export HAVE_GCC_FNO_DEFAULT_INLINE=@HAVE_GCC_FNO_DEFAULT_INLINE@
 export HAVE_GCC_FNO_ENFORCE_EH_SPECS=@HAVE_GCC_FNO_ENFORCE_EH_SPECS@
 export HAVE_GCC_FNO_INLINE=@HAVE_GCC_FNO_INLINE@
 export HAVE_GCC_GGDB2=@HAVE_GCC_GGDB2@
-export HAVE_GCC_NO_LONG_DOUBLE=@HAVE_GCC_NO_LONG_DOUBLE@
 export HAVE_GCC_PRAGMA_OPERATOR=@HAVE_GCC_PRAGMA_OPERATOR@
 export HAVE_GCC_VISIBILITY_BROKEN=@HAVE_GCC_VISIBILITY_BROKEN@
 export HAVE_GCC_VISIBILITY_FEATURE=@HAVE_GCC_VISIBILITY_FEATURE@

configure.ac

@@ -5748,17 +5748,6 @@ if test "$GCC" = "yes"; then
         AC_MSG_RESULT([no])
     fi
 
-    AC_MSG_CHECKING([whether $CC supports -Wno-long-double])
-    save_CFLAGS=$CFLAGS
-    CFLAGS="$CFLAGS -Werror -Wno-long-double"
-    AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ return 0; ]])],[ HAVE_GCC_NO_LONG_DOUBLE=TRUE ],[])
-    CFLAGS=$save_CFLAGS
-    if test "$HAVE_GCC_NO_LONG_DOUBLE" = "TRUE"; then
-        AC_MSG_RESULT([yes])
-    else
-        AC_MSG_RESULT([no])
-    fi
-
     AC_MSG_CHECKING([whether $CC supports -mno-avx])
     save_CFLAGS=$CFLAGS
     CFLAGS="$CFLAGS -Werror -mno-avx"
@@ -5862,7 +5851,6 @@ if test "$GCC" = "yes"; then
     AC_LANG_POP([C++])
 fi
 
-AC_SUBST(HAVE_GCC_NO_LONG_DOUBLE)
 AC_SUBST(HAVE_GCC_AVX)
 AC_SUBST(HAVE_GCC_BUILTIN_ATOMIC)
 

external/lpsolve/lp_solve_5.5.patch

@@ -55,8 +55,8 @@
  
  rm *.o 2>/dev/null
 --- misc/build/lp_solve_5.5/lpsolve55/ccc.osx.orig	Thu Jun 23 22:53:08 2005
-+++ misc/build/lp_solve_5.5/lpsolve55/ccc.osx	Sun May 22 11:19:48 2011
++++ misc/build/lp_solve_5.5/lpsolve55/ccc.osx
-@@ -1,23 +1,36 @@
+@@ -1,23 +1,31 @@
  src='../lp_MDO.c ../shared/commonlib.c ../shared/mmio.c ../shared/myblas.c ../ini.c ../fortify.c ../colamd/colamd.c ../lp_rlp.c ../lp_crash.c ../bfp/bfp_LUSOL/lp_LUSOL.c ../bfp/bfp_LUSOL/LUSOL/lusol.c ../lp_Hash.c ../lp_lib.c ../lp_wlp.c ../lp_matrix.c ../lp_mipbb.c ../lp_MPS.c ../lp_params.c ../lp_presolve.c ../lp_price.c ../lp_pricePSE.c ../lp_report.c ../lp_scale.c ../lp_simplex.c ../lp_SOS.c ../lp_utils.c ../yacc_read.c'
 -c=cc
 +c=$CC
@@ -78,12 +78,7 @@
  fi
  
 -opts='-idirafter /usr/include/sys -O3 -DINTEGERTIME -Wno-long-double'
-+if [ "$HAVE_GCC_NO_LONG_DOUBLE" = "YES" ] ; then
++opts='-idirafter /usr/include/sys -O3 -DINTEGERTIME'
-+    opts='-idirafter /usr/include/sys -O3 -DINTEGERTIME -Wno-long-double'
-+else
-+    opts='-idirafter /usr/include/sys -O3 -DINTEGERTIME'
-+fi
-+
  
 -$c -s -c -I.. -I../shared -I../bfp -I../bfp/bfp_LUSOL -I../bfp/bfp_LUSOL/LUSOL -I../colamd $opts $def -DYY_NEVER_INTERACTIVE -DPARSER_LP -DINVERSE_ACTIVE=INVERSE_LUSOL -DRoleIsExternalInvEngine $src
 +$c $extra_cflags -s -c -I.. -I../shared -I../bfp -I../bfp/bfp_LUSOL -I../bfp/bfp_LUSOL/LUSOL -I../colamd $opts $def -DYY_NEVER_INTERACTIVE -DPARSER_LP -DINVERSE_ACTIVE=INVERSE_LUSOL -DRoleIsExternalInvEngine $extra_cdefs $src

solenv/gbuild/platform/macosx.mk

@@ -57,10 +57,6 @@ gb_CXXFLAGS := \
 	#-Wshadow \ break in compiler headers already
 	#-fsigned-char \ might be removed?
 
-ifeq ($(HAVE_GCC_NO_LONG_DOUBLE),TRUE)
-gb_CXXFLAGS += -Wno-long-double
-endif
-
 # these are to get g++ to switch to Objective-C++ mode
 # (see toolkit module for a case where it is necessary to do it this way)
 gb_OBJCXXFLAGS := -x objective-c++ -fobjc-exceptions