From df74defbb64026811fe676309a236fe649116d45 Mon Sep 17 00:00:00 2001
From: David Kastrup <dak@gnu.org>
Date: Mon, 28 Nov 2011 14:14:49 +0100
Subject: [PATCH] Work around compiler bug, Issue 1997: segfault in
tablature-negative-fret.ly
---
configure.in | 1 +
stepmake/aclocal.m4 | 12 ++++++++++++
2 files changed, 13 insertions(+)
diff --git a/configure.in b/configure.in
index 74a27bbfa8..8dc4e5ca97 100644
--- a/configure.in
+++ b/configure.in
@@ -99,6 +99,7 @@ STEPMAKE_GCC_OR_CLANG(REQUIRED, 3.4)
STEPMAKE_CXX(REQUIRED)
STEPMAKE_GXX_OR_CLANG(REQUIRED, 3.4)
+STEPMAKE_GXXCODEGENBUG
STEPMAKE_CXXTEMPLATE
STEPMAKE_STL_DATA_METHOD
STEPMAKE_LIB(REQUIRED)
diff --git a/stepmake/aclocal.m4 b/stepmake/aclocal.m4
index c29621b409..8045c3ef0a 100644
--- a/stepmake/aclocal.m4
+++ b/stepmake/aclocal.m4
@@ -286,6 +286,18 @@ AC_DEFUN(STEPMAKE_CXXTEMPLATE, [
fi
])
+AC_DEFUN(STEPMAKE_GXXCODEGENBUG, [
+ AC_MSG_CHECKING([options for known g++ tail call bug])
+ case "$GXX:$CXX_VERSION" in
+ yes:400600?)
+ AC_MSG_RESULT([-fno-optimize-sibling-calls])
+ CXXFLAGS="$CXXFLAGS -fno-optimize-sibling-calls"
+ ;;
+ *) AC_MSG_RESULT([none])
+ esac
+ AC_SUBST(CXXFLAGS)
+])
+
AC_DEFUN(STEPMAKE_DATADIR, [
if test "$datadir" = "\${prefix}/share"; then
--
2.39.5