[Buildroot] [PATCH] package/gauche: fix getcontext not solved error on link

[Hiroshi Kawashima]

This patch is ported from bdwgc package.
Gauche use internal boehm gc so it has same problem.

I touch configure directly instead of configure.ac because autoreconf
failed by version mismatch of autotools.

Will fix:
http://autobuild.buildroot.org/results/8c6/8c6ce526735a36b8c8b4c6047e3c69039c4527cb//
http://autobuild.buildroot.org/results/894/89460829a737a4dab19103f7a46905636420b0a8//

Signed-off-by: Hiroshi Kawashima <kei-k at ca2.so-net.ne.jp>
---
 ...ac-add-check-for-NO_GETCONTEXT-definition.patch |   61 ++++++++++++++++++++
 1 files changed, 61 insertions(+), 0 deletions(-)
 create mode 100644 package/gauche/0002-gc-configure.ac-add-check-for-NO_GETCONTEXT-definition.patch

diff --git a/package/gauche/0002-gc-configure.ac-add-check-for-NO_GETCONTEXT-definition.patch b/package/gauche/0002-gc-configure.ac-add-check-for-NO_GETCONTEXT-definition.patch
new file mode 100644
index 0000000..8940574
--- /dev/null
+++ b/package/gauche/0002-gc-configure.ac-add-check-for-NO_GETCONTEXT-definition.patch
@@ -0,0 +1,61 @@
+gc/configure.ac: add check for NO_GETCONTEXT definition
+
+This patch is ported from bdwgc package.
+Gauche use internal boehm gc so it has same problem.
+
+I touch configure directly instead of configure.ac because autoreconf
+failed by version mismatch of autotools.
+
+Signed-off-by: Hiroshi Kawashima <kei-k at ca2.so-net.ne.jp>
+
+Original credits of patch in bdwgc package:
+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>
+
+diff -ur a/gc/configure b/gc/configure
+--- a/gc/configure	2015-11-12 21:41:02.394822056 +0900
++++ b/gc/configure	2015-11-12 22:04:14.655157423 +0900
+@@ -16153,6 +16153,23 @@
+ $as_echo "$ac_cv_fno_strict_aliasing" >&6; }
+ fi
+ 
++# Check for getcontext (uClibc can be configured without it, for example)
++for ac_func in getcontext
++do :
++  ac_fn_c_check_func "$LINENO" "getcontext" "ac_cv_func_getcontext"
++if test "x$ac_cv_func_getcontext" = xyes; then :
++  cat >>confdefs.h <<_ACEOF
++#define HAVE_GETCONTEXT 1
++_ACEOF
++
++fi
++done
++
++if test "$ac_cv_func_getcontext" = "no"; then :
++  CFLAGS="$CFLAGS -DNO_GETCONTEXT"
++   CPPFLAGS="$CPPFLAGS -DNO_GETCONTEXT"
++fi
++
+ case "$host" in
+ # While IRIX 6 has libdl for the O32 and N32 ABIs, it's missing for N64
+ # and unnecessary everywhere.
+diff -ur a/gc/configure.ac b/gc/configure.ac
+--- a/gc/configure.ac	2015-11-12 22:31:44.851510997 +0900
++++ b/gc/configure.ac	2015-11-12 22:33:39.292191227 +0900
+@@ -459,6 +459,12 @@
+   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.
-- 
1.7.1

============================================================
    Hiroshi Kawashima