From: Richard Purdie Subject: [PATCH 1/5] Makefile.in: Ensure build CPP/CPPFLAGS is used for build targets During cross compiling, CPP is being set to the target compiler even for build targets. As an example, when building a cross compiler targetting mingw, the config.log for libiberty in build.x86_64-pokysdk-mingw32.i586-poky-linux/build-x86_64-linux/libiberty/config.log shows: configure:3786: checking how to run the C preprocessor configure:3856: result: x86_64-pokysdk-mingw32-gcc -E --sysroot=[sysroot]/x86_64-nativesdk-mingw32-pokysdk-mingw32 configure:3876: x86_64-pokysdk-mingw32-gcc -E --sysroot=[sysroot]/x86_64-nativesdk-mingw32-pokysdk-mingw32 conftest.c configure:3876: $? = 0 This is libiberty being built for the build environment, not the target one (i.e. in build-x86_64-linux). As such it should be using the build environment's gcc and not the target one. In the mingw case the system headers are quite different leading to build failures related to not being able to include a process.h file for pem-unix.c. Further analysis shows the same issue occuring for CPPFLAGS too. Fix this by adding support for CPP_FOR_BUILD and CPPFLAGS_FOR_BUILD which for example, avoids mixing the mingw headers for host binaries on linux systems. 2021-10-27 Richard Purdie ChangeLog: * Makefile.tpl: Add CPP_FOR_BUILD and CPPFLAGS_FOR_BUILD support * Makefile.in: Regenerate. * configure: Regenerate. * configure.ac: Add CPP_FOR_BUILD and CPPFLAGS_FOR_BUILD support gcc/ChangeLog: * configure: Regenerate. * configure.ac: Use CPPFLAGS_FOR_BUILD for GMPINC Signed-off-by: Richard Purdie Submitted [https://gcc.gnu.org/pipermail/gcc-patches/2021-October/582727.html] Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=84401ce5fb4ecab55decb472b168100e7593e01f] --- Makefile.in | 6 ++++++ Makefile.tpl | 6 ++++++ configure | 4 ++++ configure.ac | 4 ++++ gcc/configure | 2 +- gcc/configure.ac | 2 +- 6 files changed, 22 insertions(+), 2 deletions(-) Index: gcc-11.2.0/Makefile.in =================================================================== --- gcc-11.2.0.orig/Makefile.in +++ gcc-11.2.0/Makefile.in @@ -151,6 +151,8 @@ BUILD_EXPORTS = \ CC="$(CC_FOR_BUILD)"; export CC; \ CFLAGS="$(CFLAGS_FOR_BUILD)"; export CFLAGS; \ CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \ + CPP="$(CPP_FOR_BUILD)"; export CPP; \ + CPPFLAGS="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS; \ CXX="$(CXX_FOR_BUILD)"; export CXX; \ CXXFLAGS="$(CXXFLAGS_FOR_BUILD)"; export CXXFLAGS; \ GFORTRAN="$(GFORTRAN_FOR_BUILD)"; export GFORTRAN; \ @@ -198,6 +200,8 @@ HOST_EXPORTS = \ AR="$(AR)"; export AR; \ AS="$(AS)"; export AS; \ CC_FOR_BUILD="$(CC_FOR_BUILD)"; export CC_FOR_BUILD; \ + CPP_FOR_BUILD="$(CPP_FOR_BUILD)"; export CPP_FOR_BUILD; \ + CPPFLAGS_FOR_BUILD="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS_FOR_BUILD; \ CXX_FOR_BUILD="$(CXX_FOR_BUILD)"; export CXX_FOR_BUILD; \ DLLTOOL="$(DLLTOOL)"; export DLLTOOL; \ LD="$(LD)"; export LD; \ @@ -353,6 +357,8 @@ AR_FOR_BUILD = @AR_FOR_BUILD@ AS_FOR_BUILD = @AS_FOR_BUILD@ CC_FOR_BUILD = @CC_FOR_BUILD@ CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@ +CPP_FOR_BUILD = @CPP_FOR_BUILD@ +CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@ CXXFLAGS_FOR_BUILD = @CXXFLAGS_FOR_BUILD@ CXX_FOR_BUILD = @CXX_FOR_BUILD@ DLLTOOL_FOR_BUILD = @DLLTOOL_FOR_BUILD@ Index: gcc-11.2.0/Makefile.tpl =================================================================== --- gcc-11.2.0.orig/Makefile.tpl +++ gcc-11.2.0/Makefile.tpl @@ -154,6 +154,8 @@ BUILD_EXPORTS = \ CC="$(CC_FOR_BUILD)"; export CC; \ CFLAGS="$(CFLAGS_FOR_BUILD)"; export CFLAGS; \ CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \ + CPP="$(CPP_FOR_BUILD)"; export CPP; \ + CPPFLAGS="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS; \ CXX="$(CXX_FOR_BUILD)"; export CXX; \ CXXFLAGS="$(CXXFLAGS_FOR_BUILD)"; export CXXFLAGS; \ GFORTRAN="$(GFORTRAN_FOR_BUILD)"; export GFORTRAN; \ @@ -201,6 +203,8 @@ HOST_EXPORTS = \ AR="$(AR)"; export AR; \ AS="$(AS)"; export AS; \ CC_FOR_BUILD="$(CC_FOR_BUILD)"; export CC_FOR_BUILD; \ + CPP_FOR_BUILD="$(CPP_FOR_BUILD)"; export CPP_FOR_BUILD; \ + CPPFLAGS_FOR_BUILD="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS_FOR_BUILD; \ CXX_FOR_BUILD="$(CXX_FOR_BUILD)"; export CXX_FOR_BUILD; \ DLLTOOL="$(DLLTOOL)"; export DLLTOOL; \ LD="$(LD)"; export LD; \ @@ -356,6 +360,8 @@ AR_FOR_BUILD = @AR_FOR_BUILD@ AS_FOR_BUILD = @AS_FOR_BUILD@ CC_FOR_BUILD = @CC_FOR_BUILD@ CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@ +CPP_FOR_BUILD = @CPP_FOR_BUILD@ +CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@ CXXFLAGS_FOR_BUILD = @CXXFLAGS_FOR_BUILD@ CXX_FOR_BUILD = @CXX_FOR_BUILD@ DLLTOOL_FOR_BUILD = @DLLTOOL_FOR_BUILD@ Index: gcc-11.2.0/configure =================================================================== --- gcc-11.2.0.orig/configure +++ gcc-11.2.0/configure @@ -652,6 +652,8 @@ GFORTRAN_FOR_BUILD DLLTOOL_FOR_BUILD CXX_FOR_BUILD CXXFLAGS_FOR_BUILD +CPPFLAGS_FOR_BUILD +CPP_FOR_BUILD CFLAGS_FOR_BUILD CC_FOR_BUILD AS_FOR_BUILD @@ -4092,6 +4094,7 @@ if test "${build}" != "${host}" ; then AR_FOR_BUILD=${AR_FOR_BUILD-ar} AS_FOR_BUILD=${AS_FOR_BUILD-as} CC_FOR_BUILD=${CC_FOR_BUILD-gcc} + CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CPP)}" CXX_FOR_BUILD=${CXX_FOR_BUILD-g++} GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran} GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo} @@ -9809,6 +9812,7 @@ esac # our build compiler if desired. if test x"${build}" = x"${host}" ; then CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}} + CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}} CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}} LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}} fi Index: gcc-11.2.0/configure.ac =================================================================== --- gcc-11.2.0.orig/configure.ac +++ gcc-11.2.0/configure.ac @@ -1347,6 +1347,7 @@ if test "${build}" != "${host}" ; then AR_FOR_BUILD=${AR_FOR_BUILD-ar} AS_FOR_BUILD=${AS_FOR_BUILD-as} CC_FOR_BUILD=${CC_FOR_BUILD-gcc} + CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CPP)}" CXX_FOR_BUILD=${CXX_FOR_BUILD-g++} GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran} GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo} @@ -3321,6 +3322,7 @@ esac # our build compiler if desired. if test x"${build}" = x"${host}" ; then CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}} + CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}} CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}} LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}} fi @@ -3387,6 +3389,8 @@ AC_SUBST(AR_FOR_BUILD) AC_SUBST(AS_FOR_BUILD) AC_SUBST(CC_FOR_BUILD) AC_SUBST(CFLAGS_FOR_BUILD) +AC_SUBST(CPP_FOR_BUILD) +AC_SUBST(CPPFLAGS_FOR_BUILD) AC_SUBST(CXXFLAGS_FOR_BUILD) AC_SUBST(CXX_FOR_BUILD) AC_SUBST(DLLTOOL_FOR_BUILD) Index: gcc-11.2.0/gcc/configure =================================================================== --- gcc-11.2.0.orig/gcc/configure +++ gcc-11.2.0/gcc/configure @@ -12699,7 +12699,7 @@ else CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \ CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \ LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \ - GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \ + GMPINC="" CPPFLAGS="${CPPFLAGS_FOR_BUILD} -DGENERATOR_FILE" \ ${realsrcdir}/configure \ --enable-languages=${enable_languages-all} \ ${enable_obsolete+--enable-obsolete="$enable_obsolete"} \ Index: gcc-11.2.0/gcc/configure.ac =================================================================== --- gcc-11.2.0.orig/gcc/configure.ac +++ gcc-11.2.0/gcc/configure.ac @@ -2023,7 +2023,7 @@ else CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \ CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \ LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \ - GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \ + GMPINC="" CPPFLAGS="${CPPFLAGS_FOR_BUILD} -DGENERATOR_FILE" \ ${realsrcdir}/configure \ --enable-languages=${enable_languages-all} \ ${enable_obsolete+--enable-obsolete="$enable_obsolete"} \