From b456730c947b377061ca6ba2d75b15bcbe82cd9d Mon Sep 17 00:00:00 2001
From: Marko Lindqvist <cazfi74@gmail.com>
Date: Sat, 5 Oct 2024 13:26:50 +0300
Subject: [PATCH 35/35] Autotools: Drop emscripten support

Emscripten builds must be made with meson.

See RM #932

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
---
 Makefile.am                     |   1 -
 configure.ac                    |  87 +++++++-----------------
 gen_headers/freeciv_config.h.in |   3 +-
 m4/emscripten.m4                |  16 -----
 m4/sdl2-client.m4               | 117 +++++++++++++++-----------------
 m4/sound.m4                     |  75 ++++++++++----------
 6 files changed, 113 insertions(+), 186 deletions(-)
 delete mode 100644 m4/emscripten.m4

diff --git a/Makefile.am b/Makefile.am
index 238605dde3..06e07adb06 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -52,7 +52,6 @@ EXTRA_DIST =	autogen.sh 			\
 		m4/codeset.m4			\
 		m4/compiler.m4			\
 		m4/debug.m4			\
-		m4/emscripten.m4		\
 		m4/expanddir.m4			\
 		m4/fc-sdl2.m4			\
 		m4/fcdb-mysql.m4		\
diff --git a/configure.ac b/configure.ac
index 79b0767c3b..6931db44e3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,8 +25,6 @@ dnl AC_SYS_YEAR2038() added in autoconf-2.73
 m4_ifdef([AC_SYS_YEAR2038],
    [AC_SYS_YEAR2038])
 
-FC_EMSCRIPTEN
-
 BUG_URL="$PACKAGE_BUGREPORT"
 MAIL_ADDRESS="freeciv-dev AT freelists.org"
 
@@ -133,15 +131,7 @@ AC_ARG_ENABLE([fcdb],
   AS_HELP_STRING([--enable-fcdb[=no/all/mysql/odbc/postgres/sqlite3]],
                  [database backends [sqlite3](no, or list)]),
 [databases=${enableval}],
-[if test "x$emscripten" != "xyes" ; then
-  databases=sqlite3
-else
-  databases=no
-fi])
-
-if test "x$emscripten" = "xyes" && test "x$databases" != "xno" ; then
-  AC_MSG_ERROR([fcdb not supported with emscripten])
-fi
+[databases=sqlite3])
 
 for db in $(echo $databases | $SED 's/,/ /g') ; do
   if test "x$db" = "xall" ; then
@@ -164,11 +154,7 @@ done
 AC_ARG_ENABLE([fcmp],
   AS_HELP_STRING([--enable-fcmp=no/yes/gtk3/gtk4/gtk4x/qt/cli/all/auto], [build freeciv-modpack-program [auto]]),
 [fc_mp=${enableval}],
-[if test "x$emscripten" = "xyes" ; then
-  fc_mp=no
-else
-  fc_mp=auto
-fi])
+[fc_mp=auto])
 
 fcmp_cli=no
 fcmp_gtk3=no
@@ -177,10 +163,6 @@ fcmp_gtk5=no
 fcmp_qt=no
 fcmp_list=
 
-if test "x$fc_mp" != "xno" && test "x$emscripten" = "xyes" ; then
-  AC_MSG_ERROR([fcmp not supported with emscripten])
-fi
-
 if test "x$fc_mp" = "xcli" ; then
   dnl Only cli requested -> no gui needed
   modinst=cli
@@ -651,16 +633,14 @@ if test "x$PKG_CONFIG" = "x" ; then
   AC_MSG_ERROR([pkg-config not found])
 fi
 
-if test "x$emscripten" != "xyes" ; then
-  PKG_CHECK_MODULES([CURL_MIME_API], [libcurl > 7.56.0],
-    [UTILITY_CFLAGS="${UTILITY_CFLAGS} ${CURL_MIME_API_CFLAGS}"
-     UTILITY_LIBS="${UTILITY_LIBS} ${CURL_MIME_API_LIBS}"
-     AC_DEFINE([HAVE_CURL_MIME_API], [1], [libcurl has the mime api])],
-    [PKG_CHECK_MODULES([CURL], [libcurl >= 7.15.4],
-      [UTILITY_CFLAGS="${UTILITY_CFLAGS} ${CURL_CFLAGS}"
-       UTILITY_LIBS="${UTILITY_LIBS} ${CURL_LIBS}"],
-      [AC_MSG_ERROR([libcurl development files required])])])
-fi
+PKG_CHECK_MODULES([CURL_MIME_API], [libcurl > 7.56.0],
+  [UTILITY_CFLAGS="${UTILITY_CFLAGS} ${CURL_MIME_API_CFLAGS}"
+   UTILITY_LIBS="${UTILITY_LIBS} ${CURL_MIME_API_LIBS}"
+   AC_DEFINE([HAVE_CURL_MIME_API], [1], [libcurl has the mime api])],
+  [PKG_CHECK_MODULES([CURL], [libcurl >= 7.15.4],
+    [UTILITY_CFLAGS="${UTILITY_CFLAGS} ${CURL_CFLAGS}"
+     UTILITY_LIBS="${UTILITY_LIBS} ${CURL_LIBS}"],
+    [AC_MSG_ERROR([libcurl development files required])])])
 
 AC_ARG_ENABLE([xml-registry],
   AS_HELP_STRING([--enable-xml-registry], [build xml-backend for registry (WIP)]),
@@ -678,15 +658,10 @@ if test "x$XMLREGISTRY" = "xyes" ; then
   AC_DEFINE([FREECIV_HAVE_XML_REGISTRY], [1], [Build xml-backend for registry])
 fi
 
-if test "x$emscripten" != "xyes" ; then
-  PKG_CHECK_MODULES([ICU], [icu-uc],,
-      [AC_MSG_ERROR([icu development files not found. Adjusting PKG_CONFIG_PATH may help])])
-  UTILITY_CFLAGS="${UTILITY_CFLAGS} ${ICU_CFLAGS}"
-  UTILITY_LIBS="${UTILITY_LIBS} ${ICU_LIBS}"
-else
-  CFLAGS="$CFLAGS -s USE_ICU=1"
-  CXXFLAGS="$CXXFLAGS -s USE_ICU=1"
-fi
+PKG_CHECK_MODULES([ICU], [icu-uc],,
+    [AC_MSG_ERROR([icu development files not found. Adjusting PKG_CONFIG_PATH may help])])
+UTILITY_CFLAGS="${UTILITY_CFLAGS} ${ICU_CFLAGS}"
+UTILITY_LIBS="${UTILITY_LIBS} ${ICU_LIBS}"
 
 dnl Should we build Qt5 versions of Qt programs?
 dnl This needs to be before C++ compiler check FC_WORKING_CXX, and
@@ -768,10 +743,6 @@ dnl Defaults to override with host specific values
 HOST_PATH_SEPARATOR=":"
 HOST_DIR_SEPARATOR="/"
 
-if test "x$emscripten" = "xyes" ; then
-  AC_DEFINE([ALWAYS_ROOT], [1], [Can execute program as root - emscripten])
-fi
-
 dnl Settings specific to host OS
 case "$host_os" in
 
@@ -837,21 +808,16 @@ CPPFLAGS="$CPPFLAGS -DBINDIR=\"\\\"$bindir\\\"\""
 
 COMMON_LIBS="${COMMON_LIBS} -lm"
 
-if test "x$emscripten" != "xyes" ; then
-  dnl Check for zlib
-  AC_CHECK_LIB([z], [gzgets],
-    [AC_DEFINE([FREECIV_HAVE_LIBZ], [1], [zlib is available])
-  UTILITY_LIBS="${UTILITY_LIBS} -lz"
-  COMMON_LIBS="$COMMON_LIBS -lz"],
-    AC_MSG_ERROR([Could not find zlib library.]))
+dnl Check for zlib
+AC_CHECK_LIB([z], [gzgets],
+  [AC_DEFINE([FREECIV_HAVE_LIBZ], [1], [zlib is available])
+UTILITY_LIBS="${UTILITY_LIBS} -lz"
+COMMON_LIBS="$COMMON_LIBS -lz"],
+  AC_MSG_ERROR([Could not find zlib library.]))
 
-  AC_CHECK_HEADER([zlib.h], [],
-    AC_MSG_ERROR([zlib found but not zlib.h.
+AC_CHECK_HEADER([zlib.h], [],
+  AC_MSG_ERROR([zlib found but not zlib.h.
 You may need to install a zlib devel package.]))
-else
-  CFLAGS="$CFLAGS -s USE_ZLIB=1"
-  CXXFLAGS="$CXXFLAGS -s USE_ZLIB=1"
-fi
 
 AC_PATH_PROG(GZIP, gzip, "no")
 if test "$GZIP" = "no"; then
@@ -1000,11 +966,6 @@ LIBS_SAVE="${LIBS}"
 if test "x$fctinycthr" = "xyes" ; then
   thread_impl_c=tinycthread
   thread_impl_cpp=tinycthread
-elif test "x$emscripten" = "xyes" ; then
-  thread_impl_c=pthreads
-  thread_impl_cpp=pthreads
-  CFLAGS="$CFLAGS -s USE_PTHREADS=1"
-  CXXFLAGS="$CXXFLAGS -s USE_PTHREADS=1"
 fi
 
 if test "x$thread_impl_c" = "xnone" ; then
@@ -1810,14 +1771,12 @@ AC_ARG_ENABLE([sys-tolua-cmd],
   no)
     if test "x$cross_compiling" = "xyes" ; then
       AC_MSG_ERROR([Must use external build system tolua command when cross-compiling])
-    elif test "x$emscripten" = "xyes" ; then
-      AC_MSG_ERROR([Must use external build system tolua command in emscripten build])
     fi
     sys_tolua_cmd=false ;;
   *)
     sys_tolua_cmd=${enableval} ;;
 esac], [
-if test "x$cross_compiling" = "xyes" || test "x$emscripten" = "xyes" ; then
+if test "x$cross_compiling" = "xyes" ; then
   sys_tolua_cmd=true
 else
   dnl Our own tolua is better than upstream one, so prefer it.
diff --git a/gen_headers/freeciv_config.h.in b/gen_headers/freeciv_config.h.in
index 322073491a..9c7e9e7743 100644
--- a/gen_headers/freeciv_config.h.in
+++ b/gen_headers/freeciv_config.h.in
@@ -29,9 +29,8 @@
 /* Metaserver URL */
 #undef FREECIV_META_URL
 
-#ifndef __EMSCRIPTEN__
+/* Metaserver communication built in */
 #define FREECIV_META_ENABLED
-#endif /* __EMSCRIPTEN__ */
 
 /* Month next version will be released */
 #undef FREECIV_RELEASE_MONTH
diff --git a/m4/emscripten.m4 b/m4/emscripten.m4
deleted file mode 100644
index 5c9c6102a7..0000000000
--- a/m4/emscripten.m4
+++ /dev/null
@@ -1,16 +0,0 @@
-# Configure checks for emscripten client
-
-AC_DEFUN([FC_EMSCRIPTEN],
-[
-  AC_MSG_CHECKING([for emscripten])
-  AC_COMPILE_IFELSE(
-    [AC_LANG_SOURCE(
-      [[#ifndef __EMSCRIPTEN__
-         error fail
-        #endif
-      ]])],
-      [AC_MSG_RESULT([yes])
-       emscripten=yes],
-      [AC_MSG_RESULT([no])
-       emscripten=no])
-])
diff --git a/m4/sdl2-client.m4 b/m4/sdl2-client.m4
index 8085f9bcf8..75aea052cb 100644
--- a/m4/sdl2-client.m4
+++ b/m4/sdl2-client.m4
@@ -7,77 +7,70 @@ AC_DEFUN([FC_SDL2_CLIENT],
 [
   if test "x$gui_sdl2" = "xyes" || test "x$client" = "xall" ||
      test "x$client" = "xauto" ; then
-    if test "x$emscripten" = "xyes" ; then
-      gui_sdl2_cflags="-s USE_SDL=2 -s USE_SDL_IMAGE=2 -s USE_SDL_TTF=2 -s USE_SDL_GFX=2"
-      gui_sdl2_ldflags="-s USE_SDL=2 -s USE_SDL_IMAGE=2 -s USE_SDL_TTF=2 -s USE_SDL_GFX=2"
-      gui_sdl2=yes
-      client=yes
-    else
-      AM_PATH_SDL2([2.0.0], [sdl2_found="yes"], [sdl2_found="no"])
-      if test "$sdl2_found" = yes; then
-        gui_sdl2_cflags="$SDL2_CFLAGS"
-        gui_sdl2_libs="$SDL2_LIBS"
-        FC_SDL2_PROJECT([SDL2_image], [IMG_Load], [SDL_image.h])
-        if test "x$sdl2_h_found" = "xyes" ; then
-          FC_SDL2_PROJECT([SDL2_ttf], [TTF_OpenFont], [SDL_ttf.h])
-        else
-          missing_2_project="SDL2_image"
+    AM_PATH_SDL2([2.0.0], [sdl2_found="yes"], [sdl2_found="no"])
+    if test "$sdl2_found" = yes; then
+      gui_sdl2_cflags="$SDL2_CFLAGS"
+      gui_sdl2_libs="$SDL2_LIBS"
+      FC_SDL2_PROJECT([SDL2_image], [IMG_Load], [SDL_image.h])
+      if test "x$sdl2_h_found" = "xyes" ; then
+        FC_SDL2_PROJECT([SDL2_ttf], [TTF_OpenFont], [SDL_ttf.h])
+      else
+        missing_2_project="SDL2_image"
+      fi
+      if test "x$sdl2_h_found" = "xyes" ; then
+        FC_SDL2_PROJECT([SDL2_gfx], [rotozoomSurface], [SDL2_rotozoom.h])
+      elif test "x$missing_2_project" = "x" ; then
+        missing_2_project="SDL2_ttf"
+      fi
+      if test "x$sdl2_h_found" = "xyes" ; then
+        dnl Version number here is as specified by libtool, not the main
+        dnl freetype version number.
+        dnl See https://git.savannah.gnu.org/cgit/freetype/freetype2.git/tree/docs/VERSIONS.TXT
+        PKG_CHECK_MODULES([FT2], [freetype2 >= 7.0.1], [freetype_found="yes"], [freetype_found="no"])
+        if test "$freetype_found" = yes; then
+          gui_sdl2_cflags="$gui_sdl2_cflags $FT2_CFLAGS"
+          gui_sdl2_libs="$gui_sdl2_libs $FT2_LIBS"
+          found_sdl2_client=yes
+        elif test "x$gui_sdl2" = "xyes"; then
+          AC_MSG_ERROR([specified client 'sdl2' not configurable (FreeType2 >= 2.1.3 is needed (www.freetype.org))])
         fi
-        if test "x$sdl2_h_found" = "xyes" ; then
-          FC_SDL2_PROJECT([SDL2_gfx], [rotozoomSurface], [SDL2_rotozoom.h])
-        elif test "x$missing_2_project" = "x" ; then
-          missing_2_project="SDL2_ttf"
+      elif test "x$gui_sdl2" = "xyes"; then
+        if test "x$missing_2_project" = "x" ; then
+          missing_2_project="SDL2_gfx"
         fi
-        if test "x$sdl2_h_found" = "xyes" ; then
-          dnl Version number here is as specified by libtool, not the main
-          dnl freetype version number.
-          dnl See https://git.savannah.gnu.org/cgit/freetype/freetype2.git/tree/docs/VERSIONS.TXT
-          PKG_CHECK_MODULES([FT2], [freetype2 >= 7.0.1], [freetype_found="yes"], [freetype_found="no"])
-          if test "$freetype_found" = yes; then
-            gui_sdl2_cflags="$gui_sdl2_cflags $FT2_CFLAGS"
-            gui_sdl2_libs="$gui_sdl2_libs $FT2_LIBS"
-            found_sdl2_client=yes
-          elif test "x$gui_sdl2" = "xyes"; then
-            AC_MSG_ERROR([specified client 'sdl2' not configurable (FreeType2 >= 2.1.3 is needed (www.freetype.org))])
-          fi
-        elif test "x$gui_sdl2" = "xyes"; then
-          if test "x$missing_2_project" = "x" ; then
-            missing_2_project="SDL2_gfx"
-          fi
-          if test "x$sdl2_lib_found" = "xyes" ; then
-            missing_type="-devel"
-          else
-            missing_type=""
-          fi
-          AC_MSG_ERROR([specified client 'sdl2' not configurable (${missing_2_project}${missing_type} is needed (www.libsdl.org))])
+        if test "x$sdl2_lib_found" = "xyes" ; then
+          missing_type="-devel"
+        else
+          missing_type=""
         fi
+        AC_MSG_ERROR([specified client 'sdl2' not configurable (${missing_2_project}${missing_type} is needed (www.libsdl.org))])
       fi
+    fi
 
-      if test "$found_sdl2_client" = yes; then
-        gui_sdl2=yes
-        if test "x$client" = "xauto" ; then
-          client=yes
-        fi
+    if test "$found_sdl2_client" = yes; then
+      gui_sdl2=yes
+      if test "x$client" = "xauto" ; then
+        client=yes
+      fi
 
-        dnl Check for libiconv (which is usually included in glibc, but may
-        dnl be distributed separately).
-        AM_ICONV
-        FC_LIBCHARSET
-        AM_LANGINFO_CODESET
-        gui_sdl2_libs="$LIBICONV $gui_sdl2_libs"
+      dnl Check for libiconv (which is usually included in glibc, but may
+      dnl be distributed separately).
+      AM_ICONV
+      FC_LIBCHARSET
+      AM_LANGINFO_CODESET
+      gui_sdl2_libs="$LIBICONV $gui_sdl2_libs"
 
-        dnl Check for some other libraries - needed under BeOS for instance.
-        dnl These should perhaps be checked for in all cases?
-        AC_CHECK_LIB(socket, connect, gui_sdl2_libs="-lsocket $gui_sdl2_libs")
-        AC_CHECK_LIB(bind, gethostbyaddr, gui_sdl2_libs="-lbind $gui_sdl2_libs")
+      dnl Check for some other libraries - needed under BeOS for instance.
+      dnl These should perhaps be checked for in all cases?
+      AC_CHECK_LIB(socket, connect, gui_sdl2_libs="-lsocket $gui_sdl2_libs")
+      AC_CHECK_LIB(bind, gethostbyaddr, gui_sdl2_libs="-lbind $gui_sdl2_libs")
 
-        dnl Control -mwindows flag ourselves instead of letting pkg-config to force
-        dnl it on us.
-        gui_sdl2_libs="$(echo $gui_sdl2_libs | $SED 's/-mwindows//g') $MWINDOWS_FLAG"
+      dnl Control -mwindows flag ourselves instead of letting pkg-config to force
+      dnl it on us.
+      gui_sdl2_libs="$(echo $gui_sdl2_libs | $SED 's/-mwindows//g') $MWINDOWS_FLAG"
 
-      elif test "x$gui_sdl2" = "xyes"; then
-        AC_MSG_ERROR([specified client 'sdl2' not configurable (SDL2 >= 2.0.0 is needed (www.libsdl.org))])
-      fi
+    elif test "x$gui_sdl2" = "xyes"; then
+      AC_MSG_ERROR([specified client 'sdl2' not configurable (SDL2 >= 2.0.0 is needed (www.libsdl.org))])
     fi
   fi
 ])
diff --git a/m4/sound.m4 b/m4/sound.m4
index a8827c315e..b898170695 100644
--- a/m4/sound.m4
+++ b/m4/sound.m4
@@ -9,55 +9,48 @@ AC_DEFUN([FC_CHECK_SOUND],[
 
 if test "x$USE_SOUND_SDL" != "xno" ; then
   dnl Add SDL2-mixer support to client
-  if test "x$emscripten" = "xyes" ; then
-    SOUND_CFLAGS="$SOUND_CFLAGS -s USE_SDL_MIXER=2"
-    SOUND_LIBS="$SOUND_LIBS -s USE_SDL_MIXER=2"
+  SDL2_VERSION=2.0.6
+  AM_PATH_SDL2([$SDL2_VERSION], [SDL2=yes], [SDL2=no])
+  if test "x$SDL2" != "xno" ; then
+    PKG_CHECK_MODULES([SDL2MIXER], [SDL2_mixer],
+[
+    SOUND_CFLAGS="$SOUND_CFLAGS $SDL2MIXER_CFLAGS"
+    SOUND_LIBS="$SOUND_LIBS $SDL2MIXER_LIBS"
+    AC_DEFINE([AUDIO_SDL], [1], [SDL Mixer support])
     SDL_mixer=sdl2
     SOUND_SDL_OK=true
-  else
-    SDL2_VERSION=2.0.6
-    AM_PATH_SDL2([$SDL2_VERSION], [SDL2=yes], [SDL2=no])
-    if test "x$SDL2" != "xno" ; then
-      PKG_CHECK_MODULES([SDL2MIXER], [SDL2_mixer],
-  [
-      SOUND_CFLAGS="$SOUND_CFLAGS $SDL2MIXER_CFLAGS"
-      SOUND_LIBS="$SOUND_LIBS $SDL2MIXER_LIBS"
-      AC_DEFINE([AUDIO_SDL], [1], [SDL Mixer support])
-      SDL_mixer=sdl2
-      SOUND_SDL_OK=true
-      if test x$sdl_headers_without_path != xyes ; then
-	AC_CHECK_HEADER([SDL2/SDL_mixer.h], [], [
+    if test x$sdl_headers_without_path != xyes ; then
+      AC_CHECK_HEADER([SDL2/SDL_mixer.h], [], [
 AC_DEFINE([SDL2_PLAIN_INCLUDE], [1], [sdl2 headers must be included without path])
 sdl_headers_without_path=yes])
     fi
 ], [
-      ac_save_CPPFLAGS="$CPPFLAGS"
-      ac_save_CFLAGS="$CFLAGS"
-      ac_save_LIBS="$LIBS"
-      CPPFLAGS="$CPPFLAGS $SDL2_CFLAGS"
-      CFLAGS="$CFLAGS $SDL2_CFLAGS"
-      LIBS="$LIBS $SDL2_LIBS"
-      AC_CHECK_HEADER([SDL_mixer.h], [SDL_mixer_h=1], [SDL_mixer_h=0])
-      AC_CHECK_LIB([SDL2_mixer], [Mix_OpenAudio], [SDL_mixer=sdl2])
-      CPPFLAGS="$ac_save_CPPFLAGS"
-      CFLAGS="$ac_save_CFLAGS"
-      LIBS="$ac_save_LIBS"
+    ac_save_CPPFLAGS="$CPPFLAGS"
+    ac_save_CFLAGS="$CFLAGS"
+    ac_save_LIBS="$LIBS"
+    CPPFLAGS="$CPPFLAGS $SDL2_CFLAGS"
+    CFLAGS="$CFLAGS $SDL2_CFLAGS"
+    LIBS="$LIBS $SDL2_LIBS"
+    AC_CHECK_HEADER([SDL_mixer.h], [SDL_mixer_h=1], [SDL_mixer_h=0])
+    AC_CHECK_LIB([SDL2_mixer], [Mix_OpenAudio], [SDL_mixer=sdl2])
+    CPPFLAGS="$ac_save_CPPFLAGS"
+    CFLAGS="$ac_save_CFLAGS"
+    LIBS="$ac_save_LIBS"
 
-      AC_MSG_CHECKING([building SDL2_mixer support])
-      if test "x$SDL_mixer_h" = "x1"; then
-	if test "x$SDL_mixer" = "xsdl2"; then
-	  SOUND_CFLAGS="$SOUND_CFLAGS $SDL2_CFLAGS"
-	  SOUND_LIBS="$SOUND_LIBS -lSDL2_mixer $SDL2_LIBS"
-	  AC_DEFINE([AUDIO_SDL], [1], [SDL Mixer support])
-	  AC_MSG_RESULT([yes])
-	  SOUND_SDL_OK=true
-	else
-	  AC_MSG_RESULT([no SDL2_mixer library found, install from https://github.com/libsdl-org/SDL_mixer ])
-	fi
+    AC_MSG_CHECKING([building SDL2_mixer support])
+    if test "x$SDL_mixer_h" = "x1"; then
+      if test "x$SDL_mixer" = "xsdl2"; then
+        SOUND_CFLAGS="$SOUND_CFLAGS $SDL2_CFLAGS"
+        SOUND_LIBS="$SOUND_LIBS -lSDL2_mixer $SDL2_LIBS"
+        AC_DEFINE([AUDIO_SDL], [1], [SDL Mixer support])
+        AC_MSG_RESULT([yes])
+        SOUND_SDL_OK=true
       else
-	AC_MSG_RESULT([no SDL2_mixer headers found, install from https://github.com/libsdl-org/SDL_mixer])
-      fi ])
-    fi
+        AC_MSG_RESULT([no SDL2_mixer library found, install from https://github.com/libsdl-org/SDL_mixer ])
+      fi
+    else
+      AC_MSG_RESULT([no SDL2_mixer headers found, install from https://github.com/libsdl-org/SDL_mixer])
+    fi ])
   fi
 fi
 
-- 
2.45.2

