From 7e5822aee235331bda026d05106e7418c2d117df Mon Sep 17 00:00:00 2001
From: Oleksandr Zinenko <zinenko@lri.fr>
Date: Mon, 5 Jan 2015 10:30:48 +0100
Subject: [PATCH] Update m4 scripts, fix Clang compilation warnings

---
 m4/ax_compiler_vendor.m4 | 49 +++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 38 insertions(+), 11 deletions(-)

diff --git a/m4/ax_compiler_vendor.m4 b/m4/ax_compiler_vendor.m4
index b074260..2f1623b 100644
--- a/m4/ax_compiler_vendor.m4
+++ b/m4/ax_compiler_vendor.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#       http://www.nongnu.org/autoconf-archive/ax_compiler_vendor.html
+#    http://www.gnu.org/software/autoconf-archive/ax_compiler_vendor.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -44,18 +44,45 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
+#serial 15
+
 AC_DEFUN([AX_COMPILER_VENDOR],
-[
-AC_CACHE_CHECK([for _AC_LANG compiler vendor], ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor,
- [ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor=unknown
-  # note: don't check for gcc first since some other compilers define __GNUC__
-  for ventest in intel:__ICC,__ECC,__INTEL_COMPILER ibm:__xlc__,__xlC__,__IBMC__,__IBMCPP__ pathscale:__PATHCC__,__PATHSCALE__ gnu:__GNUC__ sun:__SUNPRO_C,__SUNPRO_CC hp:__HP_cc,__HP_aCC dec:__DECC,__DECCXX,__DECC_VER,__DECCXX_VER borland:__BORLANDC__,__TURBOC__ comeau:__COMO__ cray:_CRAYC kai:__KCC lcc:__LCC__ metrowerks:__MWERKS__ sgi:__sgi,sgi microsoft:_MSC_VER watcom:__WATCOMC__ portland:__PGI; do
-    vencpp="defined("`echo $ventest | cut -d: -f2 | sed 's/,/) || defined(/g'`")"
+[AC_CACHE_CHECK([for _AC_LANG compiler vendor], ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor,
+  dnl Please add if possible support to ax_compiler_version.m4
+  [# note: don't check for gcc first since some other compilers define __GNUC__
+  vendors="intel:     __ICC,__ECC,__INTEL_COMPILER
+           ibm:       __xlc__,__xlC__,__IBMC__,__IBMCPP__
+           pathscale: __PATHCC__,__PATHSCALE__
+           clang:     __clang__
+           cray:      _CRAYC
+           fujitsu:   __FUJITSU
+           gnu:       __GNUC__
+           sun:       __SUNPRO_C,__SUNPRO_CC
+           hp:        __HP_cc,__HP_aCC
+           dec:       __DECC,__DECCXX,__DECC_VER,__DECCXX_VER
+           borland:   __BORLANDC__,__CODEGEARC__,__TURBOC__
+           comeau:    __COMO__
+           kai:       __KCC
+           lcc:       __LCC__
+           sgi:       __sgi,sgi
+           microsoft: _MSC_VER
+           metrowerks: __MWERKS__
+           watcom:    __WATCOMC__
+           portland:  __PGI
+     tcc:       __TINYC__
+           unknown:   UNKNOWN"
+  for ventest in $vendors; do
+    case $ventest in
+      *:) vendor=$ventest; continue ;;
+      *)  vencpp="defined("`echo $ventest | sed 's/,/) || defined(/g'`")" ;;
+    esac
     AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,[
-#if !($vencpp)
-      thisisanerror;
-#endif
-])], [ax_cv_]_AC_LANG_ABBREV[_compiler_vendor=`echo $ventest | cut -d: -f1`; break])
+      #if !($vencpp)
+        thisisanerror;
+      #endif
+    ])], [break])
   done
+  ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor=`echo $vendor | cut -d: -f1`
  ])
 ])
+
-- 
2.11.4.GIT