I'm on a openSUSE 11.4 system with a:
gcc (SUSE Linux) 4.5.1 20101208 [gcc-4_5-branch revision 167585]
host compiler. When I building gdb trunk, I get a failure to build because
configure tests g++ to see if these work, but gdb links with gcc and 4.5.1
errors out with the flag. You can't set LDFLAGS, because that is given to gcc,
without testing the flag with gcc. So, either:
AC_LANG_PUSH(C++)
goes away, or we need to exclude 4.5 as well. I tested the first approach and
while it gives a message, it doesn't fail the link, so short of rewriting the
test, we need to bump the minor number up 1. I make no claim that 4.6.0
doesn't also fail.
If someone knows when the driver was made to error out with the proper return
code, it would be better to put that into the test instead.
Here is the failure trying to make the first approach work:
configure:4926: checking whether gcc accepts -static-libstdc++ -static-libgcc
configure:4937: gcc -o conftest -g -O2 -static-libstdc++ -static-libgcc
conftest.c >&5
gcc: unrecognized option '-static-libstdc++'
configure:4937: $? = 0
configure:4938: result: yes
Ok?
diff --git a/binutils/configure b/binutils/configure
index a2671fb..d9cb7b8 100755
--- a/binutils/configure
+++ b/binutils/configure
@@ -4981,7 +4981,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-#if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
+#if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
#error -static-libstdc++ not implemented
#endif
int main() {}
diff --git a/binutils/configure.ac b/binutils/configure.ac
index 04cf83f..c819263 100644
--- a/binutils/configure.ac
+++ b/binutils/configure.ac
@@ -1269,7 +1269,7 @@ if test "$GCC" = yes; then
AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
AC_LANG_PUSH(C++)
AC_LINK_IFELSE([
-#if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
+#if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
#error -static-libstdc++ not implemented
#endif
int main() {}],
