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libffi: Add -mno-compact-eh when compiling for Mips

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Fix compilation on Mips. Resolve issues detected here:
    http://autobuild.buildroot.net/results/f0c9db496233f53c26e92294d7305aa4511ec7b3/
    http://autobuild.buildroot.net/results/8968690c248df86b040218867f92b573721e872c/
    http://autobuild.buildroot.net/results/a35db8e6a49d022133b486b12f6a8e40b3c95b6e/

Also remove previous special case handling defined in libffi.mk.

[Thomas: add Signed-off-by from Jérôme inside the patch itself.]
Signed-off-by: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Jérôme Pouiller 2013-08-09 09:34:30 +02:00 committed by Thomas Petazzoni
parent 129233fed6
commit 98204e8fea
2 changed files with 27 additions and 6 deletions
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27
package/libffi/libffi-002-Fix-use-of-compact-eh-frames-on-MIPS.patch Normal file
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@ -0,0 +1,27 @@
Newer MIPS toolchains use a different (compact) eh_frame format.
libffi don't like them, so we have to switch to the older format.
This patch add -mno-compact-eh to CFLAGS when compiling for
Mips and compiler support it.
Signed-off-by: Jérôme Pouiller <jezz@sysmic.org>
--- a/configure.ac 2013-08-08 14:53:11.884267155 +0200
+++ b/configure.ac 2013-08-08 14:54:14.437493244 +0200
@@ -430,6 +430,16 @@
AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
+if test x$TARGET = xMIPS; then
+ save_CFLAGS="$CFLAGS"
+ CFLAGS=-mno-compact-eh
+ AC_MSG_CHECKING([whether the C compiler needs -mno-compact-eh])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
+ [AC_MSG_RESULT([yes])]; [save_CFLAGS="$save_CFLAGS -mno-compact-eh"],
+ [AC_MSG_RESULT([no])])
+ CFLAGS="$save_CFLAGS"
+fi
+
if test x$TARGET = xX86_64; then
AC_CACHE_CHECK([assembler supports unwind section type],
libffi_cv_as_x86_64_unwind_section_type, [

6
package/libffi/libffi.mk
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@ -11,12 +11,6 @@ LIBFFI_LICENSE_FILES = LICENSE
LIBFFI_INSTALL_STAGING = YES
LIBFFI_AUTORECONF = YES
# Newer CS MIPS toolchains use a different (compact) eh_frame format
# libffi don't like them, just switch to the older format
ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201209)$(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201203),y)
LIBFFI_CONF_ENV = CFLAGS="$(TARGET_CFLAGS) -mno-compact-eh"
endif
# Move the headers to the usual location, and adjust the .pc file
# accordingly.
define LIBFFI_MOVE_STAGING_HEADERS