From 8c8e0995fcfe6d25ed4a963120cb59bb0466582b Mon Sep 17 00:00:00 2001
From: vimene <vincent.menegaux@gmail.com>
Date: Mon, 15 Dec 2025 04:23:13 +0100
Subject: improved Vulkan detection

Added checks to see if LunarG's Vulkan SDK is present, and check if it's
the correct API version (currently supporting only 1.4.313).
---
 configure.ac | 41 +++++++++++++++++++++++++++++++++++------
 1 file changed, 35 insertions(+), 6 deletions(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index d26e69b..8a2c3d4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,15 +6,44 @@ AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
 AM_INIT_AUTOMAKE([foreign subdir-objects])
 AC_CONFIG_FILES([Makefile src/Makefile])
-
-dnl TODO: add check for Vulkan Utility Library
-PKG_CHECK_MODULES(           [GLFW3],   [glfw3  >= 3.3.10])
-PKG_CHECK_MODULES(           [VULKAN],  [vulkan >= 1.3.275])
-PKG_HAVE_DEFINE_WITH_MODULES([NCURSES], [ncurses >= 6.4.20230625])
+AC_REQUIRE_AUX_FILE([tap-driver.sh])
 
 AC_PROG_CXX
 AC_TYPE_UINT32_T
 AC_CHECK_FUNCS([floor setlocale])
 
-AC_REQUIRE_AUX_FILE([tap-driver.sh])
+dnl TODO: add check for Vulkan Utility Library
+
+PKG_CHECK_MODULES([GLFW3], [glfw3  >= 3.3.10])
+
+dnl TODO: improve vulkan detection
+
+dnl TODO: sdk detection is too minimal
+AC_MSG_CHECKING([for VULKAN_SDK])
+AS_IF([test "x$VULKAN_SDK" != x], [AC_MSG_RESULT([yes])], [
+  AC_MSG_RESULT([no])
+  AC_MSG_ERROR([VULKAN_SDK is not set. You have to source setup-env.sh from LunarG's Vulkan SDK before configuring.])
+])
+
+AC_LANG([C])
+CFLAGS_save="$CFLAGS"
+LIBS_save="$LIBS"
+CFLAGS="$VULKAN_CFLAGS"
+LIBS="$LIBS $VULKAN_LIBS"
+AC_MSG_CHECKING([for Vulkan version 1.4.313])
+AC_RUN_IFELSE([AC_LANG_PROGRAM([
+#include <stdlib.h>
+#include <vulkan/vulkan.h>
+],[if (VK_HEADER_VERSION_COMPLETE != VK_MAKE_API_VERSION(0, 1, 4, 313)) exit(1)])], [AC_MSG_RESULT([yes])], [
+  AC_MSG_RESULT([no])
+  AC_MSG_ERROR([Vulkan not found, or wrong version (1.4.313 required)])
+])
+CFLAGS="$CFLAGS_save"
+LIBS="$LIBS_save"
+
+AC_SUBST([VULKAN_CFLAGS])
+AC_SUBST([VULKAN_LIBS])
+
+PKG_HAVE_DEFINE_WITH_MODULES([NCURSES], [ncurses >= 6.4.20230625])
+
 AC_OUTPUT
-- 
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