Created attachment 33674 [details] [review]
Add search for libiconv in user-defined directory

Current configure checks the availability of libiconv, but
has no option to specify the location of libiconv. It might
be better to provide such options. I've tried to use iconv.m4
included in gettext (written by Bruno Haible), but it didn't
work well.

diff --git a/configure.in b/configure.in
index 365abff..2b6761f 100644
--- a/configure.in
+++ b/configure.in
@@ -176,15 +176,64 @@ AC_CHECK_FUNCS([geteuid getuid link memmove memset mkstemp strchr strrchr strtol
 #
 # Checks for iconv
 #
-AC_MSG_CHECKING([for a usable iconv])
-ICONV_LIBS=""
-AC_TRY_LINK([#include <iconv.h>],
-           [iconv_open ("from", "to");],
-           [use_iconv=1],
-           [use_iconv=0])
-if test x$use_iconv = x1; then
+AC_ARG_WITH(libiconv,          [  --with-libiconv=DIR              Use libiconv in DIR],
+            libiconv_prefix=$withval, libiconv_prefix=auto)
+AC_ARG_WITH(libiconv-includes, [  --with-libiconv-includes=DIR     Use libiconv includes in DIR],
+            libiconv_includes=$withval, libiconv_includes=auto)
+AC_ARG_WITH(libiconv-lib,      [  --with-libiconv-lib=DIR          Use libiconv library in DIR],
+            libiconv_lib=$withval, libiconv_lib=auto)
+
+# if none of libiconv,libiconv-includes,libiconv-libs are specified,
+if test "$libiconv_prefix" != "auto" -o "$libiconv_includes" != "auto" -o "$libiconv_lib" != "auto"
+then
+  AC_MSG_CHECKING([libiconv in specified directory])
+
+  if test "${libiconv_includes}" != auto -a -r ${libiconv_includes}/iconv.h
+  then
+    libiconv_cflags="-I${libiconv_includes}"
+  elif test "${libiconv_prefix}" != auto -a -r ${libiconv_prefix}/include/iconv.h
+  then
+    libiconv_cflags="-I${libiconv_prefix}/include"
+  else
+    AC_MSG_RESULT([not found])
+  fi
+
+  if test "${libiconv_lib}" != auto # -a -r ${libiconv_libs}/libiconv*
+  then
+    libiconv_lib="-L${libiconv_lib} -liconv"
+  elif test "${libiconv_prefix}" != auto # -a -r ${libiconv_prefix}/lib/libiconv*
+  then
+    libiconv_lib="-L${libiconv_prefix}/lib -liconv"
+  else
+    AC_MSG_RESULT([not found])
+  fi
+
+  CFLAGS_save="${CFLAGS}" 
+  LIBS_save="${LIBS}"
+  CFLAGS="${CFLAGS} ${libiconv_cflags}"
+  LIBS="${LIBS} ${libiconv_lib}"
+  
+  AC_TRY_LINK([#include <iconv.h>],
+             [iconv_open ("from", "to");],
+             [AC_MSG_RESULT([ok])
+               use_iconv=1],
+             [AC_MSG_RESULT([not found])
+               use_iconv=0])
+  ICONV_CFLAGS="${libiconv_cflags}"
+  ICONV_LIBS="${libiconv_lib}"
+fi
+
+if test "x${ICONV_CFLAGS}" = "x" -a "x${ICONV_LIBS}" = "x"
+then
+  AC_MSG_CHECKING([for a usable iconv])
+  ICONV_LIBS=""
+  AC_TRY_LINK([#include <iconv.h>],
+             [iconv_open ("from", "to");],
+             [use_iconv=1],
+             [use_iconv=0])
+  if test x$use_iconv = x1; then
        AC_MSG_RESULT([libc])
-else
+  else
        # try using libiconv
        fontconfig_save_libs="$LIBS"
        LIBS="$LIBS -liconv"
@@ -202,7 +251,10 @@ else
        fi
 
        LIBS="$fontconfig_save_libs"
+  fi
 fi
+
+AC_SUBST(ICONV_CFLAGS)
 AC_SUBST(ICONV_LIBS)
 AC_DEFINE_UNQUOTED(USE_ICONV,$use_iconv,[Use iconv.])
 
diff --git a/src/Makefile.am b/src/Makefile.am
index 9110cde..3645ae9 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -70,6 +70,7 @@ endif
 INCLUDES =                                             \
        -I$(top_srcdir)                                 \
        -I$(top_srcdir)/src                             \
+       $(ICONV_CFLAGS)                                 \
        $(FREETYPE_CFLAGS)                              \
        $(LIBXML2_CFLAGS)                               \
        $(EXPAT_CFLAGS)                                 \