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AC_PREREQ([2.71])
AC_INIT([engine], [alpha])
AC_CONFIG_SRCDIR([src/engine.cpp])
AC_CONFIG_HEADERS([src/config.h])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])
AM_INIT_AUTOMAKE([foreign subdir-objects])
AC_CONFIG_FILES([Makefile])
AC_REQUIRE_AUX_FILE([tap-driver.sh])
AC_PROG_CXX
AC_PROG_AWK
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_MKDIR_P
AC_CHECK_HEADERS([stdint.h])
AC_CHECK_HEADER_STDBOOL
AC_TYPE_INT16_T
AC_TYPE_INT32_T
AC_TYPE_SIZE_T
AC_TYPE_UINT16_T
AC_TYPE_UINT32_T
AC_TYPE_UINT64_T
AC_CHECK_FUNCS([floor memset modf pow setlocale sqrt strtol])
AC_ARG_ENABLE([debug],
[AS_HELP_STRING([--enable-debug],
[make every path of files not built relative to the source tree, unset NDEBUG])],
[enable_debug=$enableval],
[enable_debug=no])
AM_CONDITIONAL([DEBUG], [test x"$enable_debug" = xyes])
dnl TODO: check if C++23 is supported
AC_CHECK_PROG([SLANGC], [slangc], [slangc])
AS_VAR_IF([SLANGC], [], [AC_MSG_ERROR([slangc not found])])
dnl TODO: check if slangc support Vulkan 1.4
PKG_CHECK_MODULES([GLFW3], [glfw3 >= 3.3.10])
PKG_CHECK_MODULES([VULKAN], [vulkan])
PKG_HAVE_DEFINE_WITH_MODULES([NCURSES], [ncurses >= 6.4.20230625])
AC_LANG([C++])
CXXFLAGS_save="$CXXFLAGS"
LIBS_save="$LIBS"
# ENGINE_VULKAN_VER(VARIANT, MAJOR, MINOR, PATCH, [CMP])
# ------------------------------------------------------
m4_define([ENGINE_VULKAN_VER], [[variant ]$1[ version ]ifelse([$#], [5], [$5[ ]], [[]])$2[.]$3[.]$4])
m4_define([vulkan_required_api_variant], [[0]])
m4_define([vulkan_required_api_major], [[1]])
m4_define([vulkan_required_api_minor], [[4]])
m4_define([vulkan_required_api_patch], [[313]])
m4_define([vulkan_required_api_str],
[ENGINE_VULKAN_VER(
[vulkan_required_api_variant],
[vulkan_required_api_major],
[vulkan_required_api_minor],
[vulkan_required_api_patch],
[[>=]])])
AC_MSG_CHECKING([for Vulkan headers ]vulkan_required_api_str)
CXXFLAGS="$VULKAN_CFLAGS"
AC_COMPUTE_INT([vulkan_api], [VK_HEADER_VERSION_COMPLETE], [
#include <vulkan/vulkan.h>
], [AC_MSG_ERROR([cannot check Vulkan headers version])])
AS_VAR_ARITH([vulkan_api_variant], [$vulkan_api \>\> 29])
AS_VAR_ARITH([vulkan_api_major], [\( $vulkan_api \>\> 22 \) \& 127])
AS_VAR_ARITH([vulkan_api_minor], [\( $vulkan_api \>\> 12 \) \& 1023])
AS_VAR_ARITH([vulkan_api_patch], [$vulkan_api \& 4095])
vulkan_api_str="ENGINE_VULKAN_VER([[$vulkan_api_variant]], [[$vulkan_api_major]], [[$vulkan_api_minor]], [[$vulkan_api_patch]])"
vulkan_version_ok=no
AS_VAR_IF([vulkan_api_variant], vulkan_required_api_variant, [
AS_VAR_ARITH([vulkan_version_cmp], [$vulkan_api_major \>= ]vulkan_required_api_major)
AS_VAR_IF([vulkan_version_cmp], [1], [
AS_VAR_ARITH([vulkan_version_cmp], [$vulkan_api_major \> ]vulkan_required_api_major)
AS_VAR_IF([vulkan_version_cmp], [1], [vulkan_version_ok=yes], [
AS_VAR_ARITH([vulkan_version_cmp], [$vulkan_api_minor \>= ]vulkan_required_api_minor)
AS_VAR_IF([vulkan_version_cmp], [1], [
AS_VAR_ARITH([vulkan_version_cmp], [$vulkan_api_minor \> ]vulkan_required_api_minor)
AS_VAR_IF([vulkan_version_cmp], [1], [vulkan_version_ok=yes], [
AS_VAR_ARITH([vulkan_version_cmp], [$vulkan_api_patch \>= ]vulkan_required_api_patch)
AS_VAR_IF([vulkan_version_cmp], [1], [vulkan_version_ok=yes])
])
])
])
])
])
AS_VAR_IF([vulkan_version_ok], [yes],
[AC_MSG_RESULT([yes])],
[
AC_MSG_RESULT([no])
AC_MSG_ERROR(
[Vulkan headers $vulkan_api_str found, but ]vulkan_required_api_str[ required])
])
CXXFLAGS="$CXXFLAGS_save"
LIBS="$LIBS_save"
AC_OUTPUT
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