Taken from Debian, necessary for compilation on mips.

Patch to fix integer types problem by Goswin von Brederlow
<brederlo@informatik.uni-tuebingen.de> (#258444)
--- chmlib-0.39.orig/src/chm_lib.c
+++ chmlib-0.39/src/chm_lib.c
@@ -56,6 +56,7 @@
 
 #include "lzx.h"
 
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #ifdef CHM_DEBUG
@@ -149,22 +150,9 @@
 typedef __int64                 Int64;
 typedef unsigned __int64        UInt64;
 
-/* I386, 32-bit, non-Windows */
-/* Sparc        */
-/* MIPS         */
-/* PPC          */
-#elif __i386__ || __sun || __sgi || __ppc__
-typedef unsigned char           UChar;
-typedef short                   Int16;
-typedef unsigned short          UInt16;
-typedef long                    Int32;
-typedef unsigned long           UInt32;
-typedef long long               Int64;
-typedef unsigned long long      UInt64;
-
 /* x86-64 */
 /* Note that these may be appropriate for other 64-bit machines. */
-#elif __x86_64__ || __ia64__
+#elif defined(__LP64__)
 typedef unsigned char           UChar;
 typedef short                   Int16;
 typedef unsigned short          UInt16;
@@ -173,10 +161,18 @@
 typedef long                    Int64;
 typedef unsigned long           UInt64;
 
+/* I386, 32-bit, non-Windows */
+/* Sparc        */
+/* MIPS         */
+/* PPC          */
 #else
-
-/* yielding an error is preferable to yielding incorrect behavior */
-#error "Please define the sized types for your platform in chm_lib.c"
+typedef unsigned char           UChar;
+typedef short                   Int16;
+typedef unsigned short          UInt16;
+typedef long                    Int32;
+typedef unsigned long           UInt32;
+typedef long long               Int64;
+typedef unsigned long long      UInt64;
 #endif
 
 /* GCC */
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<div class='path'>path: <a href='/guix/log/?id=e1bf91c396f134c6f924107ace97d7914a5dd733'>root</a>/<a href='/guix/log/gnu?id=e1bf91c396f134c6f924107ace97d7914a5dd733'>gnu</a>/<a href='/guix/log/gnu/packages?id=e1bf91c396f134c6f924107ace97d7914a5dd733'>packages</a>/<a href='/guix/log/gnu/packages/synergy.scm?id=e1bf91c396f134c6f924107ace97d7914a5dd733'>synergy.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/synergy.scm?id=e1bf91c396f134c6f924107ace97d7914a5dd733&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-07-12 23:08:15 +0200'>2020-07-12</span></td><td><a href='/guix/commit/gnu/packages/synergy.scm?id=b0e7b6992f3f845e83cfbca4d700b51dba50b4d5'>gnu: Remove ".git" from "https://github/…/….git".</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-07-03 14:06:42 -0500'>2020-07-03</span></td><td><a href='/guix/commit/gnu/packages/synergy.scm?id=2ca4ae2993e20a1415fa25acf8fd6b993ee48c18'>gnu: Update synergy to 1.11.1.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2020-04-03 18:04:38 +0200'>2020-04-03</span></td><td><a href='/guix/commit/gnu/packages/synergy.scm?id=ba66eec741a9fbddd74eb7fc54d2c53888ace5b7'>gnu: synergy: Fix build failure.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-01-17 17:34:35 -0600'>2020-01-17</span></td><td><a href='/guix/commit/gnu/packages/synergy.scm?id=b410c0355aeb8a282a2ee6204676efa8fe77b67a'>gnu: synergy: Update to 1.11.0.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>