I had some in-hindsight-obvious typos in my recent include_next patches, which were exposed by Sun Studio 11 on Solaris 8. They would also occur on other non-include_next C compilers. I installed the following to fix the bugs:
2007-06-23 Paul Eggert <[EMAIL PROTECTED]> * m4/include_next.m4 (gl_CHECK_NEXT_HEADERS): Check some typos exposed by Sun Studio 11 cc on Solaris 8. --- m4/include_next.m4 21 Jun 2007 04:39:09 -0000 1.2 +++ m4/include_next.m4 23 Jun 2007 07:17:45 -0000 @@ -1,4 +1,4 @@ -# include_next.m4 serial 2 +# include_next.m4 serial 3 dnl Copyright (C) 2006, 2007 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -49,12 +49,15 @@ AC_DEFUN([gl_CHECK_NEXT_HEADERS], AC_FOREACH([gl_HEADER_NAME], [$1], [AS_VAR_PUSHDEF([gl_next_header], [gl_cv_next_]m4_quote(m4_defn([gl_HEADER_NAME]))) - AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>']) - if test $gl_cv_have_include_next = no; then + if test $gl_cv_have_include_next = yes; then + AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>']) + else AC_CACHE_CHECK( [absolute name of <]m4_quote(m4_defn([gl_HEADER_NAME]))[>], m4_quote(m4_defn([gl_next_header])), - [if test AS_VAR_GET([ac_cv_header_]m4_quote(m4_defn([gl_HEADER_NAME]))) = yes; then + [AS_VAR_PUSHDEF([gl_header_exists], + [ac_cv_header_]m4_quote(m4_defn([gl_HEADER_NAME]))) + if test AS_VAR_GET(gl_header_exists) = yes; then AC_LANG_CONFTEST( [AC_LANG_SOURCE( [[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]] @@ -70,7 +73,10 @@ AC_DEFUN([gl_CHECK_NEXT_HEADERS], p q }'`'"']) - fi]) + else + AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>']) + fi + AS_VAR_POPDEF([gl_header_exists])]) fi AC_SUBST( AS_TR_CPP([NEXT_]m4_quote(m4_defn([gl_HEADER_NAME]))),