rewrite a bit that m4 macro

SVN revision: 41881

legacy/eina/m4/efl_pthread.m4

@@ -13,7 +13,7 @@ AC_DEFUN([EFL_CHECK_PTHREAD],
 dnl configure option
 
 AC_ARG_ENABLE([pthread],
-   [AC_HELP_STRING([--disable-pthread], [enable POSIX threads code @<:@default=no@:>@])],
+   [AC_HELP_STRING([--disable-pthread], [enable POSIX threads code @<:@default=yes@:>@])],
    [
     if test "x${enableval}" = "xyes" ; then
        _efl_enable_pthread="yes"
@@ -21,8 +21,8 @@ AC_ARG_ENABLE([pthread],
        _efl_enable_pthread="no"
     fi
    ],
-   [_efl_enable_pthread="yes"]
-)
+   [_efl_enable_pthread="yes"])
+
 AC_MSG_CHECKING([whether to build POSIX threads code])
 AC_MSG_RESULT([${_efl_enable_pthread}])
 
@@ -31,43 +31,25 @@ dnl check if the compiler supports pthreads
 _efl_have_pthread="no"
 
 if test "x${_efl_enable_pthread}" = "xyes" ; then
-
-   SAVE_CFLAGS=${CFLAGS}
-   CFLAGS="-pthread"
-   AC_LANG_PUSH([C])
-
-   AC_COMPILE_IFELSE(
-      [AC_LANG_PROGRAM([[
-#include <pthread.h>
-                       ]],
-                       [[]])
-      ],
-      [
-       _efl_have_pthread="yes"
-       EFL_PTHREAD_CFLAGS="-pthread"
-       EFL_PTHREAD_LIBS="-pthread"
-       ]
-   )
-
-   AC_LANG_POP([C])
-   CFLAGS=${SAVE_CFLAGS}
+   AC_CHECK_HEADER(pthread.h,
+      [_efl_have_pthread="yes"],
+      [_efl_have_pthread="no"])
 fi
 
-AC_MSG_CHECKING([whether compiler need -pthread POSIX for threads support])
-AC_MSG_RESULT([${_efl_have_pthread}])
+AC_MSG_CHECKING([whether system support POSIX threads])
+AC_MSG_RESULT([${_efl_enable_pthread}])
 
-if test "x${_efl_have_pthread}" = "xno" -a "x${_efl_enable_pthread}" = "xyes" ; then
-   AC_CHECK_HEADER(pthread.h,
-		[
-		  _efl_have_pthread="yes"
-		  EFL_PTHREAD_LIBS="-lpthread"
-		],
-		[
-		  _efl_have_pthread="no"
-		])
-
-   AC_MSG_CHECKING([whether system support POSIX threads])
-   AC_MSG_RESULT([${_efl_enable_pthread}])
+if test "x${_efl_have_pthread}" = "xyes" ; then
+   case "$host_os" in
+      solaris*)
+         EFL_PTHREAD_CFLAGS="-mt"
+         EFL_PTHREAD_LIBS="-mt"
+         ;;
+      *)
+         EFL_PTHREAD_CFLAGS="-pthread"
+         EFL_PTHREAD_LIBS="-pthead"
+         ;;
+   esac
 fi
 
 AC_SUBST(EFL_PTHREAD_CFLAGS)