cmake+autotools: add option to enable/disable iconv

CMakeLists.txt

@@ -448,6 +448,7 @@ set_option(SDL_DIRECTFB            "Use DirectFB video driver" OFF)
 dep_option(SDL_DIRECTFB_SHARED     "Dynamically load directfb support" ON "SDL_DIRECTFB" OFF)
 set_option(SDL_DUMMYVIDEO          "Use dummy video driver" ON)
 dep_option(SDL_IBUS                "Enable IBus support" ON ${UNIX_SYS} OFF)
+set_option(SDL_ICONV               "Support character set conversion through libiconv" ON)
 set_option(SDL_OPENGL              "Include OpenGL support" ON)
 set_option(SDL_OPENGLES            "Include OpenGL ES support" ON)
 set_option(SDL_PTHREADS            "Use POSIX threads for multi-threading" ${SDL_PTHREADS_ENABLED_BY_DEFAULT})
@@ -1023,6 +1024,7 @@ if(SDL_LIBC)
       endif()
     endif()
 
+    if(SDL_ICONV)
       check_library_exists(iconv iconv_open "" HAVE_LIBICONV)
       if(HAVE_LIBICONV)
         list(APPEND EXTRA_LIBS iconv)
@@ -1033,6 +1035,7 @@ if(SDL_LIBC)
           set(HAVE_ICONV 1)
         endif()
       endif()
+    endif()
 
     if(NOT APPLE)
       check_include_file(alloca.h HAVE_ALLOCA_H)

configure

@@ -840,6 +840,7 @@ enable_largefile
 enable_assertions
 enable_dependency_tracking
 enable_libc
+enable_iconv
 enable_gcc_atomics
 enable_atomic
 enable_audio
@@ -1631,6 +1632,8 @@ Optional Features:
   --enable-dependency-tracking
                           Use gcc -MMD -MT dependency tracking [default=yes]
   --enable-libc           Use the system C library [default=yes]
+  --enable-iconv          Enable character set conversion through iconv
+                          [default=yes]
   --enable-gcc-atomics    Use gcc builtin atomics [default=yes]
   --enable-atomic         Enable the atomic operations subsystem [default=yes]
   --enable-audio          Enable the audio subsystem [default=yes]
@@ -18676,6 +18679,16 @@ else $as_nop
   enable_libc=yes
 fi
 
+
+# Check whether --enable-iconv was given.
+if test ${enable_iconv+y}
+then :
+  enableval=$enable_iconv;
+else $as_nop
+  enable_iconv=yes
+fi
+
+
 if test x$enable_libc = xyes; then
 
 printf "%s\n" "#define HAVE_LIBC 1" >>confdefs.h
@@ -19883,6 +19896,7 @@ then :
 fi
 
 
+    if test x$enable_iconv = xyes; then
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for iconv_open in -liconv" >&5
 printf %s "checking for iconv_open in -liconv... " >&6; }
 if test ${ac_cv_lib_iconv_iconv_open+y}
@@ -19930,6 +19944,7 @@ then :
 
 fi
 
+    fi
 
     ac_fn_c_check_member "$LINENO" "struct sigaction" "sa_sigaction" "ac_cv_member_struct_sigaction_sa_sigaction" "#include <signal.h>
 "
@@ -28967,7 +28982,11 @@ printf "%s\n" "#define SDL_VIDEO_RENDER_OGL_ES2 1" >>confdefs.h
         SOURCES="$SOURCES $srcdir/src/video/uikit/*.m"
         SUMMARY_video="${SUMMARY_video} uikit"
         have_video=yes
-        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lm -liconv -lobjc"
+        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lm"
+        if test x$enable_iconv = xyes; then
+            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -liconv"
+        fi
+        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lobjc"
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,AVFoundation"
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,AudioToolbox"
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,CoreAudio"
@@ -29263,9 +29282,11 @@ printf "%s\n" "#define SDL_TIMER_UNIX 1" >>confdefs.h
 
         # Set up the core platform files
         SOURCES="$SOURCES $srcdir/src/core/os2/*.c"
+        if test x$enable_iconv = xyes; then
             if test x$ac_cv_func_iconv != xyes -o x$ac_cv_header_iconv_h != xyes; then
                 SOURCES="$SOURCES $srcdir/src/core/os2/geniconv/*.c"
             fi
+        fi
         # Use the Unix locale APIs.
         if test x$enable_locale = xyes; then
             SOURCES="$SOURCES $srcdir/src/locale/unix/*.c"

configure.ac

@@ -317,6 +317,12 @@ dnl See whether we are allowed to use the system C library
 AC_ARG_ENABLE(libc,
 [AS_HELP_STRING([--enable-libc], [Use the system C library [default=yes]])],
               , enable_libc=yes)
+
+dnl See whether we are allowed to use libiconv
+AC_ARG_ENABLE(iconv,
+[AS_HELP_STRING([--enable-iconv], [Enable character set conversion through iconv [default=yes]])],
+              , enable_iconv=yes)
+
 if test x$enable_libc = xyes; then
     AC_DEFINE(HAVE_LIBC, 1, [ ])
 
@@ -347,8 +353,10 @@ dnl Checks for library functions.
     AC_CHECK_LIB(m, pow, [LIBS="$LIBS -lm"; EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lm"])
     AC_CHECK_FUNCS(acos acosf asin asinf atan atanf atan2 atan2f ceil ceilf copysign copysignf cos cosf exp expf fabs fabsf floor floorf trunc truncf fmod fmodf log logf log10 log10f lround lroundf pow powf round roundf scalbn scalbnf sin sinf sqrt sqrtf tan tanf)
 
+    if test x$enable_iconv = xyes; then
         AC_CHECK_LIB(iconv, iconv_open, [LIBS="$LIBS -liconv"; EXTRA_LDFLAGS="$EXTRA_LDFLAGS -liconv"])
         AC_CHECK_FUNCS(iconv)
+    fi
 
     AC_CHECK_MEMBER(struct sigaction.sa_sigaction,[AC_DEFINE([HAVE_SA_SIGACTION], 1, [ ])], ,[#include <signal.h>])
 
@@ -4297,7 +4305,11 @@ dnl BeOS support removed after SDL 2.0.1. Haiku still works.  --ryan.
         SOURCES="$SOURCES $srcdir/src/video/uikit/*.m"
         SUMMARY_video="${SUMMARY_video} uikit"
         have_video=yes
-        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lm -liconv -lobjc"
+        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lm"
+        if test x$enable_iconv = xyes; then
+            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -liconv"
+        fi
+        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lobjc"
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,AVFoundation"
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,AudioToolbox"
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,CoreAudio"
@@ -4559,9 +4571,11 @@ dnl BeOS support removed after SDL 2.0.1. Haiku still works.  --ryan.
 
         # Set up the core platform files
         SOURCES="$SOURCES $srcdir/src/core/os2/*.c"
+        if test x$enable_iconv = xyes; then
             if test x$ac_cv_func_iconv != xyes -o x$ac_cv_header_iconv_h != xyes; then
                 SOURCES="$SOURCES $srcdir/src/core/os2/geniconv/*.c"
             fi
+        fi
         # Use the Unix locale APIs.
         if test x$enable_locale = xyes; then
             SOURCES="$SOURCES $srcdir/src/locale/unix/*.c"