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gcc: When cross compiling a target gcc, target flags may be used on the host 

The original fix worked some of the time, but not on all machines.  Fix
this by applying the change in a different way.  Following the example of
the existing BUILD_CFLAGS.

Below is the commit message from the original change to help explain why
this is needed:

Configure identifies a number of warning flags (WARN_CFLAGS and
WARN_CXXFLAGS) from the $CC value.  The cross compiler may be different
from the host compiler and may not support the same set of flags.  This
leads to problems such as:

cc1plus: error: unrecognized command line option "-Wno-narrowing"
cc1plus: error: unrecognized command line option "-Wno-overlength-strings"

Work around this problem by removing the warning flags from the
BUILD_CXXFLAGS value, in a way similar to the BUILD_CFLAGS.

(From OE-Core rev: be21c6e8e4f810e826538337dac6e34ed96e1f6f)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Mark Hatle 2013-06-24 09:44:30 -05:00 committed by Richard Purdie
parent 65385d4bb9
commit 216e4dc4aa
1 changed files with 24 additions and 34 deletions
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58
meta/recipes-devtools/gcc/gcc-4.8/gcc-4.8-build-args.patch
View File

@ -1,6 +1,6 @@
When cross compiling a target gcc, target flags may be used on the host
Configure identifies a number of warning flags (WARN_CFLAGS and
Configure identifies a number of warning flags (WARN_CFLAGS and
WARN_CXXFLAGS) from the $CC value. The cross compiler may be different
from the host compiler and may not support the same set of flags. This
leads to problems such as:
@ -9,43 +9,33 @@ cc1plus: error: unrecognized command line option "-Wno-narrowing"
cc1plus: error: unrecognized command line option "-Wno-overlength-strings"
Work around this problem by removing the warning flags from the
BUILD_*FLAGS values.
BUILD_CXXFLAGS value, in a way similar to the BUILD_CFLAGS.
Upstream-Status: Pending
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
diff -ur gcc-4.8.0.orig/gcc/configure.ac gcc-4.8.0/gcc/configure.ac
--- gcc-4.8.0.orig/gcc/configure.ac 2013-05-29 14:44:24.960853593 -0500
+++ gcc-4.8.0/gcc/configure.ac 2013-05-31 01:34:09.518775962 -0500
@@ -1892,8 +1892,8 @@
# These are the normal (build=host) settings:
CC_FOR_BUILD='$(CC)' AC_SUBST(CC_FOR_BUILD)
CXX_FOR_BUILD='$(CXX)' AC_SUBST(CXX_FOR_BUILD)
-BUILD_CFLAGS='$(ALL_CFLAGS)' AC_SUBST(BUILD_CFLAGS)
-BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
+BUILD_CFLAGS='$(ALL_BUILD_CFLAGS)' AC_SUBST(BUILD_CFLAGS)
+BUILD_CXXFLAGS='$(ALL_BUILD_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
BUILD_LDFLAGS='$(LDFLAGS)' AC_SUBST(BUILD_LDFLAGS)
STMP_FIXINC=stmp-fixinc AC_SUBST(STMP_FIXINC)
Index: gcc-4.8.0/gcc/configure
===================================================================
--- gcc-4.8.0.orig/gcc/configure
+++ gcc-4.8.0/gcc/configure
@@ -11720,6 +10581,7 @@ STMP_FIXINC=stmp-fixinc
if test x$build != x$host || test "x$coverage_flags" != x
then
BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
+ BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
fi
diff -ur gcc-4.8.0.orig/gcc/Makefile.in gcc-4.8.0/gcc/Makefile.in
--- gcc-4.8.0.orig/gcc/Makefile.in 2013-05-29 14:44:24.369853593 -0500
+++ gcc-4.8.0/gcc/Makefile.in 2013-05-31 01:34:30.360776427 -0500
@@ -989,10 +989,16 @@
ALL_CFLAGS = $(T_CFLAGS) $(CFLAGS-$@) \
$(CFLAGS) $(INTERNAL_CFLAGS) $(COVERAGE_FLAGS) $(WARN_CFLAGS) @DEFS@
Index: gcc-4.8.0/gcc/configure.ac
===================================================================
--- gcc-4.8.0.orig/gcc/configure.ac
+++ gcc-4.8.0/gcc/configure.ac
@@ -1901,6 +1901,7 @@ STMP_FIXINC=stmp-fixinc AC_SUBST(STMP_F
if test x$build != x$host || test "x$coverage_flags" != x
then
BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
+ BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
fi
+ALL_BUILD_CFLAGS = $(T_CFLAGS) $(CFLAGS-$@) \
+ $(CFLAGS) $(INTERNAL_CFLAGS) @DEFS@
+
# The C++ version.
ALL_CXXFLAGS = $(T_CFLAGS) $(CFLAGS-$@) $(CXXFLAGS) $(INTERNAL_CFLAGS) \
$(COVERAGE_FLAGS) $(NOEXCEPTION_FLAGS) $(WARN_CXXFLAGS) @DEFS@
+ALL_BUILD_CXXFLAGS = $(T_CFLAGS) $(CFLAGS-$@) $(CXXFLAGS) $(INTERNAL_CFLAGS) \
+ $(NOEXCEPTION_FLAGS) @DEFS@
+
# Likewise. Put INCLUDES at the beginning: this way, if some autoconf macro
# puts -I options in CPPFLAGS, our include files in the srcdir will always
# win against random include files in /usr/include.