Update some autotools scripts

build/autotools/m4/lol-conf.m4

@@ -1,7 +1,7 @@
 dnl
 dnl  Lol Engine
 dnl
-dnl  Copyright © 2010—2020 Sam Hocevar <sam@hocevar.net>
+dnl  Copyright © 2010–2023 Sam Hocevar <sam@hocevar.net>
 dnl
 dnl  Lol Engine is free software. It comes without any warranty, to
 dnl  the extent permitted by applicable law. You can redistribute it
@@ -29,7 +29,8 @@ CXXFLAGS="${CXXFLAGS} ${version_flag}"
 
 AC_LANG_PUSH(C++)
 AC_MSG_CHECKING(for C++11 enum class support)
-AC_TRY_LINK([], [enum class Foo : int { Bar, Baz };],
+AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([], [enum class Foo : int { Bar, Baz };])],
  [AC_MSG_RESULT(yes)],
  [AC_MSG_RESULT(no)
   AC_MSG_ERROR([[C++ compiler does not support C++11 enum classes]])])
@@ -45,7 +46,8 @@ AC_DEFUN([LOL_AC_CHECK], [
 dnl  Check that the C++ compiler really works
 AC_LANG_PUSH(C++)
 AC_MSG_CHECKING(for a fully working C++ compiler)
-AC_TRY_LINK([], [],
+AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([], [])],
  [AC_MSG_RESULT(yes)],
  [AC_MSG_RESULT(no)
   AC_MSG_ERROR([[C++ compiler cannot link executables]])])

build/autotools/m4/lol-gl.m4

@@ -1,7 +1,7 @@
 dnl
 dnl  Lol Engine
 dnl
-dnl  Copyright © 2010—2020 Sam Hocevar <sam@hocevar.net>
+dnl  Copyright © 2010–2023 Sam Hocevar <sam@hocevar.net>
 dnl
 dnl  Lol Engine is free software. It comes without any warranty, to
 dnl  the extent permitted by applicable law. You can redistribute it
@@ -36,7 +36,8 @@ if test "x${ac_cv_my_stop_looking_for_gl}" = "xno"; then
   LIBS_save="$LIBS"
   LIBS="$LIBS -Wl,-framework -Wl,OpenGL"
   AC_MSG_CHECKING(for -framework OpenGL)
-  AC_TRY_LINK([], [],
+  AC_LINK_IFELSE(
+   [AC_LANG_PROGRAM([], [])],
    [AC_MSG_RESULT(yes)
     ac_cv_my_have_gl="yes"
     GL_LIBS="${GL_LIBS} -framework OpenGL"
@@ -50,7 +51,8 @@ if test "x${ac_cv_my_stop_looking_for_gl}" = "xno"; then
   LIBS_save="$LIBS"
   LIBS="$LIBS -Wl,-framework -Wl,OpenGLES"
   AC_MSG_CHECKING(for -framework OpenGLES)
-  AC_TRY_LINK([], [],
+  AC_LINK_IFELSE(
+   [AC_LANG_PROGRAM([], [])],
    [AC_MSG_RESULT(yes)
     ac_cv_my_have_gl="yes"
     GL_LIBS="${GL_LIBS} -framework OpenGLES"
@@ -109,8 +111,10 @@ if test "x${ac_cv_my_stop_looking_for_gl}" = "xno"; then
    [LIBS_save="$LIBS"
     LIBS="$LIBS -lopengl32"
     AC_MSG_CHECKING(for glLoadIdentity in -lopengl32)
-    AC_TRY_LINK([#include <GL/gl.h>],
-     [glLoadIdentity();],
+    AC_LINK_IFELSE(
+     [AC_LANG_PROGRAM(
+       [#include <GL/gl.h>],
+       [glLoadIdentity();])],
      [ac_cv_my_have_gl="yes"
       AC_DEFINE(HAVE_GL_2X, 1, Define to 1 if GL 2.x is available) # FIXME: hack
       AC_MSG_RESULT(yes)
@@ -129,9 +133,10 @@ AC_CHECK_HEADER(GL/glew.h,
  [LIBS_save="${LIBS}"
   LIBS="${LIBS} -lglew32s ${GL_LIBS}"
   AC_MSG_CHECKING(for glewInit in -lglew32s)
-  AC_TRY_LINK(
-   [#include <GL/glew.h>],
-   [glewInit();],
+  AC_LINK_IFELSE(
+   [AC_LANG_PROGRAM(
+     [#include <GL/glew.h>],
+     [glewInit();])],
    [ac_cv_my_have_glew="yes"
     GL_LIBS="-lglew32s ${GL_LIBS}"
     AC_MSG_RESULT(yes)],

build/autotools/m4/lol-misc.m4

@@ -1,7 +1,7 @@
 dnl
 dnl  Lol Engine
 dnl
-dnl  Copyright © 2010—2016 Sam Hocevar <sam@hocevar.net>
+dnl  Copyright © 2010–2023 Sam Hocevar <sam@hocevar.net>
 dnl
 dnl  Lol Engine is free software. It comes without any warranty, to
 dnl  the extent permitted by applicable law. You can redistribute it
@@ -17,7 +17,7 @@ AC_DEFUN([LOL_TRY_CFLAGS],
     [AC_MSG_CHECKING([if $CC supports $1 flags])
     save_CFLAGS="$CFLAGS"
     CFLAGS="$1 -Werror"
-    AC_TRY_COMPILE([],[],[ac_cv_try_cflags_ok=yes],[ac_cv_try_cflags_ok=no])
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],[ac_cv_try_cflags_ok=yes],[ac_cv_try_cflags_ok=no])
     CFLAGS="$save_CFLAGS"
     AC_MSG_RESULT([$ac_cv_try_cflags_ok])
     if test x"$ac_cv_try_cflags_ok" = x"yes"; then
@@ -33,7 +33,7 @@ AC_DEFUN([LOL_TRY_CXXFLAGS],
     AC_LANG_PUSH(C++)
     save_CXXFLAGS="$CXXFLAGS"
     CXXFLAGS="$1 -Werror"
-    AC_TRY_COMPILE([],[],[ac_cv_try_cxxflags_ok=yes],[ac_cv_try_cxxflags_ok=no])
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],[ac_cv_try_cxxflags_ok=yes],[ac_cv_try_cxxflags_ok=no])
     CXXFLAGS="$save_CXXFLAGS"
     AC_MSG_RESULT([$ac_cv_try_cxxflags_ok])
     if test x"$ac_cv_try_cxxflags_ok" = x"yes"; then
@@ -49,7 +49,7 @@ AC_DEFUN([LOL_TRY_LDFLAGS],
     [AC_MSG_CHECKING([if $CC supports $1 flags])
     save_LDFLAGS="$LDFLAGS"
     LDFLAGS="$1 -Werror"
-    AC_TRY_LINK([],[],[ac_cv_try_ldflags_ok=yes],[ac_cv_try_ldflags_ok=no])
+    AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],[ac_cv_try_ldflags_ok=yes],[ac_cv_try_ldflags_ok=no])
     LDFLAGS="$save_LDFLAGS"
     AC_MSG_RESULT([$ac_cv_try_ldflags_ok])
     if test x"$ac_cv_try_ldflags_ok" = x"yes"; then

build/lol-build

@@ -206,7 +206,7 @@ configure()
             CXXFLAGS="$CXXFLAGS -m64"
             ;;
         web-*)
-            # Force cross-compilation because AC_TRY_LINK is going to check
+            # Force cross-compilation because AC_LINK_IFELSE is going to check
             # whether our binaries have the executable bit set.
             HOSTFLAGS=--host=none
             BUILDFLAGS=--build=`$top_srcdir/.auto/config.guess`

configure.ac

@@ -1,7 +1,7 @@
 dnl
 dnl  Lol Engine
 dnl
-dnl  Copyright © 2010—2017 Sam Hocevar <sam@hocevar.net>
+dnl  Copyright © 2010–2023 Sam Hocevar <sam@hocevar.net>
 dnl
 dnl  Lol Engine is free software. It comes without any warranty, to
 dnl  the extent permitted by applicable law. You can redistribute it
@@ -10,10 +10,10 @@ dnl  to Public License, Version 2, as published by the WTFPL Task Force.
 dnl  See http://www.wtfpl.net/ for more details.
 dnl
 
-AC_INIT(lolengine, 0.0)
-AC_PREREQ(2.50)
+AC_INIT([lolengine], [0.0])
+AC_PREREQ(2.69)
 AC_CONFIG_AUX_DIR(.auto)
-AC_CANONICAL_SYSTEM
+AC_CANONICAL_TARGET
 AM_INIT_AUTOMAKE([subdir-objects no-define tar-ustar silent-rules])
 dnl AM_MAINTAINER_MODE
 
@@ -28,7 +28,6 @@ AM_PROG_CC_C_O
 AC_PROG_CPP
 AC_PROG_CXX
 AC_PROG_CXXCPP
-AC_PROG_RANLIB
 
 LT_INIT([win32-dll])
 LT_LANG([C++])
@@ -221,9 +220,10 @@ AC_SUBST(LOL_USE_DOT)
 
 dnl  GCC-specific symbol demangling
 AC_LANG_PUSH(C++)
-AC_TRY_LINK(
- [#include <cxxabi.h>],
- [abi::__cxa_demangle(NULL, 0, 0, NULL);],
+AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+   [#include <cxxabi.h>],
+   [abi::__cxa_demangle(NULL, 0, 0, NULL);])],
  [AC_DEFINE(HAVE_CXA_DEMANGLE, 1, Define to 1 if abi::__cxa_demangle is available)])
 AC_LANG_POP(C++)
 
@@ -259,7 +259,7 @@ AM_CONDITIONAL(BUILD_SAMPLES, test "${enable_samples}" != "no" -a "${enable_subp
 
 LOL_AC_FINI()
 
-AC_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS([config.h])
 
 AC_CONFIG_FILES(
  [Makefile