From 1fab40bb69669efcb52d03fd688289551727ad7a Mon Sep 17 00:00:00 2001
From: Yang Tse <yangsita@gmail.com>
Date: Tue, 14 Oct 2008 04:09:07 +0000
Subject: Initial attempt to detect Watcom C compiler

---
 ares/m4/cares-compilers.m4 | 60 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

(limited to 'ares/m4/cares-compilers.m4')

diff --git a/ares/m4/cares-compilers.m4 b/ares/m4/cares-compilers.m4
index e5a20cb86..5d7f0e5eb 100644
--- a/ares/m4/cares-compilers.m4
+++ b/ares/m4/cares-compilers.m4
@@ -45,6 +45,7 @@ AC_DEFUN([CARES_CHECK_COMPILER], [
   CARES_CHECK_COMPILER_SGI_MIPS_C
   CARES_CHECK_COMPILER_SUNPRO_C
   CARES_CHECK_COMPILER_TINY_C
+  CARES_CHECK_COMPILER_WATCOM_C
   #
   if test "$compiler_id" = "unknown"; then
   cat <<_EOF 1>&2
@@ -335,6 +336,39 @@ AC_DEFUN([CARES_CHECK_COMPILER_TINY_C], [
 ])
 
 
+dnl CARES_CHECK_COMPILER_WATCOM_C
+dnl -------------------------------------------------
+dnl Verify if compiler being used is Watcom C.
+
+AC_DEFUN([CARES_CHECK_COMPILER_WATCOM_C], [
+  AC_MSG_CHECKING([if compiler is Watcom C])
+  CURL_CHECK_DEF([__WATCOMC__], [], [silent])
+  if test "$curl_cv_have_def___WATCOMC__" = "yes"; then
+    AC_MSG_RESULT([yes])
+    CURL_CHECK_DEF([__UNIX__], [], [silent])
+    if test "$curl_cv_have_def___UNIX__" = "yes"; then
+      compiler_id="WATCOM_UNIX_C"
+      flags_dbg_all="-g1 -g1+ -g2 -g3"
+      flags_dbg_yes="-g2"
+      flags_dbg_off=""
+      flags_opt_all="-O0 -O1 -O2 -O3"
+      flags_opt_yes="-O2"
+      flags_opt_off="-O0"
+    else
+      compiler_id="WATCOM_WINDOWS_C"
+      flags_dbg_all=""
+      flags_dbg_yes=""
+      flags_dbg_off=""
+      flags_opt_all=""
+      flags_opt_yes=""
+      flags_opt_off=""
+    fi
+  else
+    AC_MSG_RESULT([no])
+  fi
+])
+
+
 dnl CARES_CONVERT_INCLUDE_TO_ISYSTEM
 dnl -------------------------------------------------
 dnl Changes standard include paths present in CFLAGS
@@ -567,6 +601,18 @@ AC_DEFUN([CARES_SET_COMPILER_BASIC_OPTS], [
         tmp_CFLAGS="$tmp_CFLAGS"
         ;;
         #
+      WATCOM_UNIX_C)
+        #
+        dnl Placeholder
+        tmp_CFLAGS="$tmp_CFLAGS"
+        ;;
+        #
+      WATCOM_WINDOWS_C)
+        #
+        dnl Placeholder
+        tmp_CFLAGS="$tmp_CFLAGS"
+        ;;
+        #
     esac
     #
     tmp_CPPFLAGS=`eval echo $tmp_CPPFLAGS`
@@ -890,6 +936,20 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
         fi
         ;;
         #
+      WATCOM_UNIX_C)
+        #
+        if test "$want_warnings" = "yes"; then
+          dnl Issue all warnings
+          dnl tmp_CFLAGS="$tmp_CFLAGS -Wall -Wextra -Wpadded"
+        fi
+        ;;
+        #
+      WATCOM_WINDOWS_C)
+        #
+        dnl Placeholder
+        tmp_CFLAGS="$tmp_CFLAGS"
+        ;;
+        #
     esac
     #
     tmp_CPPFLAGS=`eval echo $tmp_CPPFLAGS`
-- 
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