[PATCH vkd3d 5/7] build: Detect soname of libvulkan at configure time.

[Chip Davis]

Load this library instead of always loading libvulkan.so.1.

Signed-off-by: Chip Davis <cdavis at codeweavers.com>
---

Notes:
    I cribbed WINE_CHECK_SONAME for this.

 configure.ac        |  6 ++---
 libs/vkd3d/device.c |  2 +-
 m4/check-soname.m4  | 55 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 59 insertions(+), 4 deletions(-)
 create mode 100644 m4/check-soname.m4

diff --git a/configure.ac b/configure.ac
index e4d0d24..6eb8a76 100644
--- a/configure.ac
+++ b/configure.ac
@@ -75,9 +75,9 @@ AC_CHECK_LIB([pthread], [pthread_create],
              [AC_MSG_ERROR([libpthread not found.])])
 
 AC_SUBST([VULKAN_LIBS])
-AC_CHECK_LIB([vulkan], [vkGetInstanceProcAddr],
-             [VULKAN_LIBS="-lvulkan"],
-             [AC_MSG_ERROR([libvulkan not found.])])
+VKD3D_CHECK_SONAME([vulkan], [vkGetInstanceProcAddr],
+                   [VULKAN_LIBS="-lvulkan"],
+                   [AC_MSG_ERROR([libvulkan not found.])])
 
 HAVE_SPIRV_TOOLS=no
 AS_IF([test "x$with_spirv_tools" = "xyes"],
diff --git a/libs/vkd3d/device.c b/libs/vkd3d/device.c
index 6fa0017..047c298 100644
--- a/libs/vkd3d/device.c
+++ b/libs/vkd3d/device.c
@@ -212,7 +212,7 @@ static HRESULT vkd3d_init_vk_global_procs(struct vkd3d_instance *instance,
 
     if (!vkGetInstanceProcAddr)
     {
-        if (!(instance->libvulkan = dlopen("libvulkan.so.1", RTLD_NOW)))
+        if (!(instance->libvulkan = dlopen(SONAME_LIBVULKAN, RTLD_NOW)))
         {
             ERR("Failed to load libvulkan.\n");
             return E_FAIL;
diff --git a/m4/check-soname.m4 b/m4/check-soname.m4
new file mode 100644
index 0000000..94efc4b
--- /dev/null
+++ b/m4/check-soname.m4
@@ -0,0 +1,55 @@
+dnl
+dnl Copyright 2002 Alexandre Julliard
+dnl
+dnl This library is free software; you can redistribute it and/or
+dnl modify it under the terms of the GNU Lesser General Public
+dnl License as published by the Free Software Foundation; either
+dnl version 2.1 of the License, or (at your option) any later version.
+dnl
+dnl This library is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+dnl Lesser General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU Lesser General Public
+dnl License along with this library; if not, write to the Free Software
+dnl Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+dnl
+dnl As a special exception to the GNU Lesser General Public License,
+dnl if you distribute this file as part of a program that contains a
+dnl configuration script generated by Autoconf, you may include it
+dnl under the same distribution terms that you use for the rest of
+dnl that program.
+
+dnl VKD3D_PATH_SONAME_TOOLS
+AC_DEFUN([VKD3D_PATH_SONAME_TOOLS],
+[AC_PATH_PROG(LDD,ldd,true,/sbin:/usr/sbin:$PATH)
+AC_CHECK_TOOL(OTOOL,otool,otool)
+AC_CHECK_TOOL(READELF,[readelf],true)])
+
+dnl VKD3D_CHECK_SONAME(library, function, [action-if-found, [action-if-not-found, [other_libraries, [pattern]]]])
+dnl
+AC_DEFUN([VKD3D_CHECK_SONAME],
+[AC_REQUIRE([VKD3D_PATH_SONAME_TOOLS])dnl
+AS_VAR_PUSHDEF([ac_Lib],[ac_cv_lib_soname_$1])dnl
+m4_pushdef([ac_lib_pattern],m4_default([$6],[lib$1]))dnl
+AC_MSG_CHECKING([for -l$1])
+AC_CACHE_VAL(ac_Lib,
+[ac_check_soname_save_LIBS=$LIBS
+  LIBS="-l$1 $5 $LIBS"
+  AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
+  [AS_CASE(["$host_os"],
+           [darwin*|macosx*], [AS_VAR_SET(ac_Lib,[`$OTOOL -L conftest$ac_exeext | grep "]ac_lib_pattern[\\.[[0-9A-Za-z.]]*dylib" | sed -e "s/^.*\/\(]ac_lib_pattern[\.[[0-9A-Za-z.]]*dylib\).*$/\1/"';2,$d'`])],
+           [AS_VAR_SET(ac_Lib,[`$READELF -d conftest$ac_exeext | grep "NEEDED.*]ac_lib_pattern[\\.$LIBEXT" | sed -e "s/^.*\\m4_dquote(\\(]ac_lib_pattern[\\.$LIBEXT[[^	 ]]*\\)\\).*$/\1/"';2,$d'`])
+            AS_VAR_IF([ac_Lib],[],
+                     [AS_VAR_SET(ac_Lib,[`$LDD conftest$ac_exeext | grep "]ac_lib_pattern[\\.$LIBEXT" | sed -e "s/^.*\(]ac_lib_pattern[\.$LIBEXT[[^	 ]]*\).*$/\1/"';2,$d'`])])])])
+  LIBS=$ac_check_soname_save_LIBS])dnl
+AS_VAR_IF([ac_Lib],[],
+      [AC_MSG_RESULT([not found])
+       $4],
+      [AC_MSG_RESULT(AS_VAR_GET(ac_Lib))
+       AC_DEFINE_UNQUOTED(AS_TR_CPP(SONAME_LIB$1),["]AS_VAR_GET(ac_Lib)["],
+                          [Define to the soname of the lib$1 library.])
+       $3])dnl
+m4_popdef([ac_lib_pattern])dnl
+AS_VAR_POPDEF([ac_Lib])])
-- 
2.18.0