This patch from upstream revision 10588.

--- fltk-1.3.3/src/Xutf8.h
+++ fltk-1.3.3/src/Xutf8.h
@@ -25,6 +25,7 @@
 #include <X11/Xlib.h>
 #include <X11/Xlocale.h>
 #include <X11/Xutil.h>
+#include <FL/Fl_Export.H>
 
 typedef struct {
 	int nb_font;
@@ -98,8 +99,8 @@
 	XUtf8FontStruct  *font_set,
 	unsigned int            ucs);
 
-int
-XGetUtf8FontAndGlyph(
+FL_EXPORT int
+fl_XGetUtf8FontAndGlyph(
         XUtf8FontStruct  *font_set,
         unsigned int            ucs,
         XFontStruct     **fnt,
--- fltk-1.3.3/src/gl_draw.cxx
+++ fltk-1.3.3/src/gl_draw.cxx
@@ -114,7 +114,7 @@
   for (int i = 0; i < 0x400; i++) {
     XFontStruct *font = NULL;
     unsigned short id;
-    XGetUtf8FontAndGlyph(gl_fontsize->font, ii, &font, &id);
+    fl_XGetUtf8FontAndGlyph(gl_fontsize->font, ii, &font, &id);
     if (font) glXUseXFont(font->fid, id, 1, gl_fontsize->listbase+ii);
     ii++;
    }
--- fltk-1.3.3/src/xutf8/utf8Wrap.c
+++ fltk-1.3.3/src/xutf8/utf8Wrap.c
@@ -816,10 +816,10 @@
 /**  get the X font and glyph ID of a UCS char                              **/
 /*****************************************************************************/
 int
-XGetUtf8FontAndGlyph(XUtf8FontStruct  *font_set,
-		     unsigned int     ucs,
-		     XFontStruct      **fnt,
-		     unsigned short   *id) {
+fl_XGetUtf8FontAndGlyph(XUtf8FontStruct  *font_set,
+			unsigned int     ucs,
+			XFontStruct      **fnt,
+			unsigned short   *id) {
 
   /* int             x; */
   int             *encodings; /* encodings array */
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<div class='path'>path: <a href='/guix/log/?id=9969b436af8c2892e59ed14ffe94905b6b18c005'>root</a>/<a href='/guix/log/gnu?id=9969b436af8c2892e59ed14ffe94905b6b18c005'>gnu</a>/<a href='/guix/log/gnu/packages?id=9969b436af8c2892e59ed14ffe94905b6b18c005'>packages</a>/<a href='/guix/log/gnu/packages/ibus.scm?id=9969b436af8c2892e59ed14ffe94905b6b18c005'>ibus.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/ibus.scm?<tr><td><span title='2016-05-24 14:45:18 +0200'>2016-05-24</span></td><td><a href='/guix/commit/tests/guix-lint.sh?id=a61cd1d0fd642c45bc61ef52f09d8f62ce3976b8'>tests: Do not run 'cve' checker in 'tests/guix-lint.sh'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-03-02 21:41:41 +0100'>2016-03-02</span></td><td><a href='/guix/commit/tests/guix-lint.sh?id=1b846da8c372bee78851439fd9e72b2499115e5a'>utils: Use '@' for separating package names and version numbers.</a><span class='msg-avail'>...</span></td><td>Mathieu Lirzin</td></tr>
</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-04-20 12:26:12 +0200'>2019-04-20</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=811eae11cd6741bd70ecac63050a95e1e61cb316'>gnu: ibus-libpinyin: Update to 1.11.0.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-04-20 12:26:08 +0200'>2019-04-20</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=b2c6b467f331d8e8b0f0d4654fb1a436a167565f'>gnu: ibus: Update to 1.5.20.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-03-10 13:37:18 +0100'>2019-03-10</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=380384e419963e3f620786f8899bfb7b7632a68d'>gnu: ibus: Update Unicode data to 12.0.0.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-02-16 01:00:09 +0100'>2019-02-16</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=f7a25b50eb136c2e7d1cfee40caebc76916ad6fa'>gnu: ibus-rime: Update to 1.4.0.</a><span class='msg-avail'>...</span></td><td>Meiyo Peng</td></tr>
<tr><td><span title='2019-02-16 01:00:08 +0100'>2019-02-16</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=775e81b5a5d040347adabeea9ed48236cd2dbcdb'>gnu: rime-data: Update to 0.38.20190131.</a><span class='msg-avail'>...</span></td><td>Meiyo Peng</td></tr>
<tr><td><span title='2019-02-16 01:00:08 +0100'>2019-02-16</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=6072d51193b33ed109bb4eb3cdbd997b69a2b1a2'>gnu: librime: Update to 1.4.0.</a><span class='msg-avail'>...</span></td><td>Meiyo Peng</td></tr>
<tr><td><span title='2019-01-18 17:58:58 +0100'>2019-01-18</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=dbac4833b4502f428e90c1541f1744c7bd949d81'>gnu: ibus: Do not hardcode Python version.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-01-16 16:08:22 +0100'>2019-01-16</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=255d1bbe777a824be726edeb9fd47458a3a877a9'>gnu: Move dbm databases to new module.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-01-16 16:08:22 +0100'>2019-01-16</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=cd0322a3efd96577de9ab35e4432d1ae399257c8'>gnu: Move sqlite to separate module.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2018-12-25 08:51:01 +0200'>2018-12-25</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=950ebfd116d7307ef8c69686576bf37eeaea0de7'>gnu: librime: Remove bundled sources.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2018-12-25 08:50:58 +0200'>2018-12-25</span></td><td><a href='/guix/commit/gnu/packages/ibus.scm?id=66b266e6df9b3b831c20820f91e55a88da4814c7'>gnu: librime: Update to 1.3.2.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>