[Buildroot] [PATCH] cairo: fix build issue with gcc 4.9
Thomas Petazzoni
thomas.petazzoni at free-electrons.com
Sun May 18 17:14:30 UTC 2014
Fixes:
http://autobuild.buildroot.org/results/277/277038de62d6262576a63b213374a33357a8333b/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
package/cairo/cairo-005-fix-gcc-49-build.patch | 38 ++++++++++++++++++++++++++
package/cairo/cairo.mk | 1 +
2 files changed, 39 insertions(+)
create mode 100644 package/cairo/cairo-005-fix-gcc-49-build.patch
diff --git a/package/cairo/cairo-005-fix-gcc-49-build.patch b/package/cairo/cairo-005-fix-gcc-49-build.patch
new file mode 100644
index 0000000..112c9ea
--- /dev/null
+++ b/package/cairo/cairo-005-fix-gcc-49-build.patch
@@ -0,0 +1,38 @@
+Fix build with gcc 4.9
+
+cairo fails to build with gcc 4.9 due to a bad interaction of cairo
+modules with the LTO mechanism. The suggested workaround is to pass
+-ffat-lto-objects. See
+https://bugs.freedesktop.org/show_bug.cgi?id=77060 for the upstream
+bug report, and
+https://bugs.archlinux.org/task/40313?project=1&openedfrom=-1+week for
+the ArchLinux bug report.
+
+This patch passes -ffat-lto-objects when gcc understands this option,
+in order to provide compatibility with gcc versions older than 4.8,
+which did not provide this option, but are anyway unaffected by the
+issue.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
+
+Index: b/configure.ac
+===================================================================
+--- a/configure.ac
++++ b/configure.ac
+@@ -37,6 +37,16 @@
+ m4_include(build/configure.ac.pthread) dnl checks for pthreads
+ AC_CACHE_SAVE
+
++old_cflags=$CFLAGS
++CFLAGS=-ffat-lto-objects
++AC_MSG_CHECKING([whether CC supports -ffat-lto-objects])
++AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
++ [AC_MSG_RESULT([yes])]
++ [LTO_CFLAGS=-ffat-lto-objects],
++ [AC_MSG_RESULT([no])]
++)
++CFLAGS="${old_CFLAGS} ${LTO_CFLAGS}"
++
+ dnl ===========================================================================
+
+ AC_CHECK_LIB(z, compress,
diff --git a/package/cairo/cairo.mk b/package/cairo/cairo.mk
index 43238ca..789dfa7 100644
--- a/package/cairo/cairo.mk
+++ b/package/cairo/cairo.mk
@@ -10,6 +10,7 @@ CAIRO_LICENSE = LGPLv2.1+
CAIRO_LICENSE_FILES = COPYING
CAIRO_SITE = http://cairographics.org/releases
CAIRO_INSTALL_STAGING = YES
+CAIRO_AUTORECONF = YES
CAIRO_CONF_ENV = ac_cv_func_posix_getpwuid_r=yes glib_cv_stack_grows=no \
glib_cv_uscore=no ac_cv_func_strtod=yes \
--
1.9.3
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