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Pass CPPFLAGS/CFLAGS/CXXFLAGS from the environment of configure to

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Makefile.config.

This is implied at the bottom of the help text of configure (besides
CC/CXX/LDFLAGS, already passed to Makefile.config).

For backward compatibility, the values of CFLAGS and CXXFLAGS defaults
to empty, overriding the default values provided by autoconf (for
example, '-g -O2' when CC=gcc').

$(CPP) is not used by our makefiles. Therefore, the value of CPP is
not passed to Makefile.config, despite beeing mentioned by 'configure
--help'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174313 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Patrik Hagglund 2013-02-04 08:15:53 +00:00
parent 9c02a27604
commit 6c440fcea5
4 changed files with 29 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
Makefile.config.in
View File

@ -156,6 +156,15 @@ CXX = @CXX@
# Path to the CC binary, which use used by testcases for native builds.
CC := @CC@
# C/C++ preprocessor flags.
CPPFLAGS += @CPPFLAGS@
# C compiler flags.
CFLAGS += @CFLAGS@
# C++ compiler flags.
CXXFLAGS += @CXXFLAGS@
# Linker flags.
LDFLAGS += @LDFLAGS@

5
autoconf/configure.ac
View File

@ -59,6 +59,11 @@ if test ${srcdir} != "." ; then
fi
fi
dnl Default to empty (i.e. assigning the null string to) CFLAGS and CXXFLAGS,
dnl instead of the autoconf default (for example, '-g -O2' for CC=gcc).
${CFLAGS=}
${CXXFLAGS=}
dnl We need to check for the compiler up here to avoid anything else
dnl starting with a different one.
AC_PROG_CC(clang llvm-gcc gcc)

11
configure vendored
View File

@ -1981,6 +1981,9 @@ echo "$as_me: error: Already configured in ${srcdir}" >&2;}
fi
fi
${CFLAGS=}
${CXXFLAGS=}
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@ -5606,8 +5609,8 @@ case "$enableval" in
x86_64) TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
sparc) TARGETS_TO_BUILD="Sparc $TARGETS_TO_BUILD" ;;
powerpc) TARGETS_TO_BUILD="PowerPC $TARGETS_TO_BUILD" ;;
arm) TARGETS_TO_BUILD="ARM $TARGETS_TO_BUILD" ;;
aarch64) TARGETS_TO_BUILD="AArch64 $TARGETS_TO_BUILD" ;;
arm) TARGETS_TO_BUILD="ARM $TARGETS_TO_BUILD" ;;
mips) TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;;
mipsel) TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;;
mips64) TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;;
@ -8716,6 +8719,8 @@ if test "${enable_ltdl_install+set}" = set; then
fi
if test x"${enable_ltdl_install-no}" != xno; then
INSTALL_LTDL_TRUE=
INSTALL_LTDL_FALSE='#'
@ -8724,6 +8729,8 @@ else
INSTALL_LTDL_FALSE=
fi
if test x"${enable_ltdl_convenience-no}" != xno; then
CONVENIENCE_LTDL_TRUE=
CONVENIENCE_LTDL_FALSE='#'
@ -10491,7 +10498,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<EOF
#line 10493 "configure"
#line 10501 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H

3
docs/MakefileGuide.rst
View File

@ -699,6 +699,9 @@ The override variables are given below:
``CFLAGS``
Additional flags to be passed to the 'C' compiler.
``CPPFLAGS``
Additional flags passed to the C/C++ preprocessor.
``CXX``
Specifies the path to the C++ compiler.