Evas: fix shm_open() check (can be in libc or librt)

This works in linux and windows, and should fix shm_detection on BSD (including Mac)

 BSD, Mac and solaris users : please check that it compiles and shm_open is detected


SVN revision: 69612

legacy/evas/configure.ac

@@ -587,31 +587,9 @@ if test "x$res" = "xyes"; then
   AC_DEFINE(HAVE_LROUND, 1, C99 lround function exists)
 fi
 
-SHM_OPEN_LINK=""
-AC_MSG_CHECKING([whether shm_open() is present])
-LIBS_save=${LIBS}
-LIBS="${LIBS} -lrt"
-AC_LINK_IFELSE(
-   [AC_LANG_PROGRAM(
-      [[
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-      ]],
-      [[
-int fd;
-fd = shm_open("/", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
-shm_unlink("/");
-      ]])],
-   [
-    have_shm_open="yes"
-    AC_DEFINE(HAVE_SHM_OPEN, 1, [Have shm_open() call])
-    SHM_OPEN_LINK="-lrt"
-   ],
-   [have_shm_open="no"])
-LIBS=${LIBS_save}
-AC_MSG_RESULT([${have_shm_open}])
-AC_SUBST(SHM_OPEN_LINK)
+if test "x${want_evas_image_loader_generic}" = "xyes" ; then
+   EFL_CHECK_SHM_OPEN
+fi
 
 # (shm_open (for cache server)
 AC_ARG_ENABLE([evas-cserve],
@@ -628,29 +606,11 @@ AC_MSG_CHECKING(whether to build shared cache server and support)
 AC_MSG_RESULT(${want_evas_cserve})
 
 if test "x${want_evas_cserve}" = "xyes" ; then
-   AC_MSG_CHECKING([whether shm_open() is present])
-   LIBS_save=${LIBS}
-   LIBS="${LIBS} -lrt"
-   AC_LINK_IFELSE(
-      [AC_LANG_PROGRAM(
-         [[
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-         ]],
-         [[
-int fd;
-fd = shm_open("/", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
-shm_unlink("/");
-         ]])],
-      [want_evas_cserve="yes"],
-      [want_evas_cserve="no"])
-   LIBS=${LIBS_save}
-   AC_MSG_RESULT([${want_evas_cserve}])
+   EFL_CHECK_SHM_OPEN([want_evas_cserve="yes"], [want_evas_cserve="no"])
 fi
 
 if test "x${want_evas_cserve}" = "xyes" ; then
-  AC_DEFINE(EVAS_CSERVE, 1, [Shared caceh server.])
+  AC_DEFINE(EVAS_CSERVE, 1, [Shared cache server.])
 fi
 
 AM_CONDITIONAL([EVAS_CSERVE], [test "x${want_evas_cserve}" = "xyes"])

legacy/evas/m4/efl_shm_open.m4

@@ -0,0 +1,70 @@
+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 shm_open function is available or not.
+
+dnl Usage: EFL_CHECK_SHM_OPEN([, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+dnl Call AC_SUBST(EFL_SHM_OPEN_LIBS)
+dnl Define HAVE_SHM_OPEN to 1if shm_open is available
+
+AC_DEFUN([EFL_CHECK_SHM_OPEN],
+[
+_efl_have_shm_open="no"
+
+dnl Check is shm_open is in libc
+
+AC_MSG_CHECKING([for shm_open in libc])
+AC_LINK_IFELSE(
+   [AC_LANG_PROGRAM(
+       [[
+#include <sys/mman.h>
+#include <sys/stat.h>        /* For mode constants */
+#include <fcntl.h>           /* For O_* constants */
+       ]],
+       [[
+int fd;
+
+fd = shm_open("/dev/null", O_RDONLY, S_IRWXU | S_IRWXG | S_IRWXO);
+       ]])],
+   [_efl_have_shm_open="yes"],
+   [_efl_have_shm_open="no"])
+
+AC_MSG_RESULT([${_efl_have_shm_open}])
+
+if test "x${_efl_have_shm_open}" = "xno" ; then
+   AC_MSG_CHECKING([for shm_open in librt])
+
+   LIBS_save="${LIBS}"
+   LIBS="${LIBS} -lrt"
+   AC_LINK_IFELSE(
+      [AC_LANG_PROGRAM(
+          [[
+#include <sys/mman.h>
+#include <sys/stat.h>        /* For mode constants */
+#include <fcntl.h>           /* For O_* constants */
+          ]],
+          [[
+int fd;
+
+fd = shm_open("/dev/null", O_RDONLY, S_IRWXU | S_IRWXG | S_IRWXO);
+          ]])],
+      [
+       EFL_SHM_OPEN_LIBS="-lrt"
+       _efl_have_shm_open="yes"
+      ],
+      [_efl_have_shm_open="no"])
+
+   LIBS="${LIBS_save}"
+
+   AC_MSG_RESULT([${_efl_have_shm_open}])
+fi
+
+AC_SUBST([EFL_SHM_OPEN_LIBS])
+
+if test "x${_efl_have_shm_open}" = "xyes" ; then
+   AC_DEFINE([HAVE_SHM_OPEN], [1], [Define to 1 if you have the `shm_open' function.])
+fi
+
+AS_IF([test "x${_efl_have_shm_open}" = "xyes"], [$1], [$2])
+
+])

legacy/evas/src/lib/cserve/Makefile.am

@@ -29,4 +29,4 @@ evas_cs_server.c \
 evas_cs_client.c \
 evas_cs_mem.c
 
-libevas_cserve_la_LIBADD = @EINA_LIBS@ -lrt
+libevas_cserve_la_LIBADD = @EINA_LIBS@ @EFL_SHM_OPEN_LIBS@

legacy/evas/src/modules/loaders/generic/Makefile.am

@@ -20,7 +20,7 @@ pkg_LTLIBRARIES = module.la
 
 module_la_SOURCES = evas_image_load_generic.c
 
-module_la_LIBADD = @EINA_LIBS@ @evas_image_loader_generic_libs@ @SHM_OPEN_LINK@ $(top_builddir)/src/lib/libevas.la
+module_la_LIBADD = @EINA_LIBS@ @evas_image_loader_generic_libs@ @EFL_SHM_OPEN_LIBS@ $(top_builddir)/src/lib/libevas.la
 module_la_LDFLAGS = -no-undefined @lt_enable_auto_import@ -module -avoid-version
 module_la_LIBTOOLFLAGS = --tag=disable-static
 
@@ -29,7 +29,7 @@ else
 noinst_LTLIBRARIES = libevas_loader_generic.la
 
 libevas_loader_generic_la_SOURCES = evas_image_load_generic.c
-libevas_loader_generic_la_LIBADD = @evas_image_loader_generic_libs@ @SHM_OPEN_LINK@
+libevas_loader_generic_la_LIBADD = @evas_image_loader_generic_libs@ @EFL_SHM_OPEN_LIBS@
 
 endif
 endif