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gcc: Workaround for compiler flag mismatch

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When cross compiling the target compiler, both the cross-compiler
and the host compiler are used.  However, the -W options used were
discovered from the cross-compiler and may be incompatible with the
host compiler.

(From OE-Core rev: 1f40202ce3c1282674b6cea39ef709972275f201)

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
2013-05-31 15:23:10 +00:00
committed by Richard Purdie
parent cd906fa2a8
commit 807476eac7
2 changed files with 52 additions and 0 deletions
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1
meta/recipes-devtools/gcc/gcc-4.8.inc
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@@ -66,6 +66,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
file://0034-Use-the-multilib-config-files-from-B-instead-of-usin.patch \
file://0035-wcast-qual-PR-55383.patch \
file://gcc-4.8-PR56797.patch \
file://gcc-4.8-build-args.patch \
"
SRC_URI[md5sum] = "e6040024eb9e761c3bea348d1fa5abb0"
SRC_URI[sha256sum] = "b037fe5132b71ecad2ea7141ec92292b5d32427bf90fd90cde432b1d5abacc2c"

51
meta/recipes-devtools/gcc/gcc-4.8/gcc-4.8-build-args.patch Normal file
View File

@@ -0,0 +1,51 @@
When cross compiling a target gcc, target flags may be used on the host
Configure identifies a number of warning flags (WARN_CFLAGS and
WARN_CXXFLAGS) from the $CC value. The cross compiler may be different
from the host compiler and may not support the same set of flags. This
leads to problems such as:
cc1plus: error: unrecognized command line option "-Wno-narrowing"
cc1plus: error: unrecognized command line option "-Wno-overlength-strings"
Work around this problem by removing the warning flags from the
BUILD_*FLAGS values.
Upstream-Status: Pending
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
diff -ur gcc-4.8.0.orig/gcc/configure.ac gcc-4.8.0/gcc/configure.ac
--- gcc-4.8.0.orig/gcc/configure.ac 2013-05-29 14:44:24.960853593 -0500
+++ gcc-4.8.0/gcc/configure.ac 2013-05-31 01:34:09.518775962 -0500
@@ -1892,8 +1892,8 @@
# These are the normal (build=host) settings:
CC_FOR_BUILD='$(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)
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@
+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.