- Modifications to compile ImageMagick

ImageMagick/m4/magick_check_pthread_lib.m4

@@ -0,0 +1,41 @@
+#
+# Macro to test for pthread library
+# Written by Bob Friesenhahn based on test in ACX_PTHREAD
+# MAGICK_CHECK_PTHREAD_LIB(LIBRARY,
+#              [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+#
+AC_DEFUN([MAGICK_CHECK_PTHREAD_LIB], [
+AC_REQUIRE([AC_CANONICAL_HOST])
+AC_LANG_SAVE
+AC_LANG_C
+magick_pthread_lib_ok=no
+
+LIB=-l$1
+save_LIBS="$LIBS"
+LIBS="$LIBS $LIB"
+
+AC_MSG_CHECKING([for the pthreads library $LIB])
+AC_TRY_LINK([#include <pthread.h>],
+  [  pthread_t th;
+  pthread_join(th, 0);
+  pthread_attr_init(0);
+  pthread_cleanup_push(0, 0);
+  pthread_create(0,0,0,0);
+  pthread_cleanup_pop(0); ],
+  [magick_pthread_lib_ok=yes])
+
+AC_MSG_RESULT(${magick_pthread_lib_ok})
+if test "$magick_pthread_lib_ok" = yes
+then
+  $2
+  :
+else
+  $3
+  :
+fi
+
+LIBS="$save_LIBS"
+
+AC_LANG_RESTORE
+])dnl MAGICK_CHECK_PTHREAD_LIB
+