abort when pthread is requested but not found

patch by Albin Tonnerre

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/evas@46657 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

diff --git a/m4/efl_pthread.m4 b/m4/efl_pthread.m4
new file mode 100644 (file)
index 0000000..e50964f
--- /dev/null
+++ b/m4/efl_pthread.m4
@@ -0,0 +1,113 @@
+dnl Copyright (C) 2010 Vincent Torri <vtorri at univ-evry dot fr>
+dnl That code is public domain and can be freely used or copied.
+
+dnl Macro that check if several pthread library is available or not.
+
+dnl Usage: EFL_CHECK_PTHREAD(want_pthread_spin[, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+dnl Call AC_SUBST(EFL_PTHREAD_CFLAGS)
+dnl Call AC_SUBST(EFL_PTHREAD_LIBS)
+dnl Define EFL_HAVE_PTHREAD
+dnl Define EFL_HAVE_PTHREAD_SPINLOCK
+
+AC_DEFUN([EFL_CHECK_PTHREAD],
+[
+
+dnl configure option
+
+AC_ARG_ENABLE([pthread],
+   [AC_HELP_STRING([--disable-pthread], [enable POSIX threads code @<:@default=auto@:>@])],
+   [
+    if test "x${enableval}" = "xyes" ; then
+       _efl_enable_pthread="yes"
+    else
+       _efl_enable_pthread="no"
+    fi
+   ],
+   [_efl_enable_pthread="auto"])
+
+AC_MSG_CHECKING([whether to build POSIX threads code])
+AC_MSG_RESULT([${_efl_enable_pthread}])
+
+dnl check if the compiler supports pthreads
+
+_efl_have_pthread="no"
+
+if test "x${_efl_enable_pthread}" = "xyes" || test "x${_efl_enable_pthread}" = "xauto" ; then
+
+   AC_COMPILE_IFELSE(
+      [AC_LANG_PROGRAM([[
+#include <pthread.h>
+                       ]],
+                       [[
+pthread_t id;
+id = pthread_self();
+                       ]])],
+      [_efl_have_pthread="yes"],
+      [_efl_have_pthread="no"])
+
+fi
+
+AC_MSG_CHECKING([whether system support POSIX threads])
+AC_MSG_RESULT([${_efl_have_pthread}])
+if test "$x{_efl_enable_pthread}" = "xyes" && test "x${_efl_have_pthread}" = "xno"; then
+   AC_MSG_ERROR([pthread support requested but not found.])
+fi
+
+if test "x${_efl_have_pthread}" = "xyes" ; then
+   case "$host_os" in
+      mingw*)
+         EFL_PTHREAD_CFLAGS=""
+         EFL_PTHREAD_LIBS="-lpthreadGC2"
+         ;;
+      solaris*)
+         EFL_PTHREAD_CFLAGS="-mt"
+         EFL_PTHREAD_LIBS="-mt"
+         ;;
+      *)
+         EFL_PTHREAD_CFLAGS="-pthread"
+         EFL_PTHREAD_LIBS="-pthread"
+         ;;
+   esac
+fi
+
+AC_SUBST(EFL_PTHREAD_CFLAGS)
+AC_SUBST(EFL_PTHREAD_LIBS)
+
+if test "x${_efl_have_pthread}" = "xyes" ; then
+   AC_DEFINE(EFL_HAVE_PTHREAD, 1, [Define to mention that POSIX threads are supported])
+fi
+
+dnl check if the compiler supports pthreads spinlock
+
+_efl_have_pthread_spinlock="no"
+
+if test "x${_efl_have_pthread}" = "xyes" && test "x$1" = "xyes" ; then
+
+   AC_COMPILE_IFELSE(
+      [AC_LANG_PROGRAM([[
+#include <pthread.h>
+                       ]],
+                       [[
+pthread_spinlock_t lock;
+int res;
+res = pthread_spin_init(&lock, PTHREAD_PROCESS_PRIVATE);
+                       ]])],
+      [_efl_have_pthread_spinlock="yes"],
+      [_efl_have_pthread_spinlock="no"])
+
+fi
+
+AC_MSG_CHECKING([whether to build POSIX threads spinlock code])
+AC_MSG_RESULT([${_efl_have_pthread_spinlock}])
+if test "$x{_efl_enable_pthread}" = "xyes" && test "x${_efl_have_pthread_spinlock}" = "xno"; then
+   AC_MSG_ERROR([pthread support requested but spinlocks are not supported])
+fi
+
+if test "x${_efl_have_pthread_spinlock}" = "xyes" ; then
+   AC_DEFINE(EFL_HAVE_PTHREAD_SPINLOCK, 1, [Define to mention that POSIX threads spinlocks are supported])
+fi
+
+AS_IF([test "x$_efl_have_pthread" = "xyes"], [$2], [$3])
+AS_IF([test "x$_efl_have_pthread_spinlock" = "xyes"], [$4], [$5])
+
+])