[OE-core] [PATCH 2/6] bdwgc: Check for getcontext() API during configure

[Khem Raj]

This helps in compiling dependent components like
guile where it shows the problem of missing getcontext
API when using libc which dont implement it e.g. musl

Signed-off-by: Khem Raj <raj.khem at gmail.com>
---
 ...ac-add-check-for-NO_GETCONTEXT-definition.patch | 29 ++++++++++++++++++++++
 meta/recipes-support/bdwgc/bdwgc_7.4.2.bb          |  1 +
 2 files changed, 30 insertions(+)
 create mode 100644 meta/recipes-support/bdwgc/bdwgc/0001-configure.ac-add-check-for-NO_GETCONTEXT-definition.patch

diff --git a/meta/recipes-support/bdwgc/bdwgc/0001-configure.ac-add-check-for-NO_GETCONTEXT-definition.patch b/meta/recipes-support/bdwgc/bdwgc/0001-configure.ac-add-check-for-NO_GETCONTEXT-definition.patch
new file mode 100644
index 0000000..8ef774f
--- /dev/null
+++ b/meta/recipes-support/bdwgc/bdwgc/0001-configure.ac-add-check-for-NO_GETCONTEXT-definition.patch
@@ -0,0 +1,29 @@
+configure.ac: add check for NO_GETCONTEXT definition
+
+Signed-off-by: Samuel Martin <s.martin49 at gmail.com>
+[yann.morin.1998 at free.fr: add a comment, change variable name, use
+ AS_IF, remove debug traces, use AC_CHECK_FUNCS (as suggested by
+ Thomas)]
+Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
+Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
+
+---
+Upstream-Status: Pending
+ configure.ac | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+--- bdwgc-7.2f.orig/configure.ac	2014-06-01 19:00:47.000000000 +0200
++++ bdwgc-7.2f/configure.ac	2014-12-23 14:13:11.585716713 +0100
+@@ -365,6 +365,12 @@
+   AC_MSG_RESULT($ac_cv_fno_strict_aliasing)
+ fi
+ 
++# Check for getcontext (uClibc can be configured without it, for example)
++AC_CHECK_FUNCS([getcontext])
++AS_IF([test "$ac_cv_func_getcontext" = "no"],
++  [CFLAGS="$CFLAGS -DNO_GETCONTEXT"
++   CPPFLAGS="$CPPFLAGS -DNO_GETCONTEXT"])
++
+ case "$host" in
+ # While IRIX 6 has libdl for the O32 and N32 ABIs, it's missing for N64
+ # and unnecessary everywhere.
diff --git a/meta/recipes-support/bdwgc/bdwgc_7.4.2.bb b/meta/recipes-support/bdwgc/bdwgc_7.4.2.bb
index 95e358f..209f533 100644
--- a/meta/recipes-support/bdwgc/bdwgc_7.4.2.bb
+++ b/meta/recipes-support/bdwgc/bdwgc_7.4.2.bb
@@ -23,6 +23,7 @@ LIC_FILES_CHKSUM = "file://README.QUICK;md5=55f5088f90a982fed7af9a4897047ef7"
 
 SRC_URI = "http://www.hboehm.info/gc/gc_source/gc-${PV}.tar.gz \
            file://0001-fix-build-with-musl.patch \
+           file://0001-configure.ac-add-check-for-NO_GETCONTEXT-definition.patch \
           "
 
 SRC_URI[md5sum] = "12c05fd2811d989341d8c6d81f66af87"
-- 
1.9.1