At some point (I don't know exactly when) Sun seems to have added a
compiler option to support C99 without messing up and mistakenly
claiming that older Solaris libraries support C99. So I installed
this patch into Autoconf:
2006-12-06 Paul Eggert <[EMAIL PROTECTED]>
* lib/autoconf/c.m4 (_AC_PROG_CC_C89): Also try -xc99=all, for Sun
C 5.8 on Solaris 10. Using -xc99=all rather than -xc99 bypasses
the buggy -xc99 option of Forte Developer 7 C on Solaris 9.
--- lib/autoconf/c.m4 1 Dec 2006 19:21:03 -0000 1.241
+++ lib/autoconf/c.m4 7 Dec 2006 06:39:16 -0000
@@ -1278,11 +1278,11 @@
dnl AIX -qlanglvl=extc99 (unused restrictive mode:
-qlanglvl=stdc99)
dnl Intel ICC -c99
dnl IRIX -c99
-dnl Solaris (unused because it causes the compiler to assume C99 semantics
for
-dnl library functions, and this is invalid before Solaris 10: -xc99)
+dnl Solaris -xc99=all (Forte Developer 7 C mishandles -xc99 on Solaris 9,
+dnl as it incorrectly assumes C99 semantics for library functions)
dnl Tru64 -c99
dnl with extended modes being tried first.
-[[-std=gnu99 -c99 -qlanglvl=extc99]], [$1], [$2])[]dnl
+[[-std=gnu99 -c99 -xc99=all -qlanglvl=extc99]], [$1], [$2])[]dnl
])# _AC_PROG_CC_C99
