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--- bdwgc/configure.ac.orig	2022-01-02 10:17:27.670680925 +0100
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+++ bdwgc/configure.ac	2022-01-02 10:19:10.029685443 +0100
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@@ -206,7 +206,7 @@
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       *-*-aix* | *-*-android* | *-*-cygwin* | *-*-darwin* | *-*-dragonfly* | \
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       *-*-freebsd* | *-*-haiku* | *-*-hpux11* | *-*-irix* | \
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       *-*-kfreebsd*-gnu | *-*-gnu* | *-*-*linux* | *-*-msys* | *-*-nacl* | \
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-      *-*-netbsd* | *-*-openbsd* | *-*-osf* | *-*-solaris*)
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+      *-*-netbsd* | *-*-openbsd* | *-*-osf* | *-*-solaris* | *-*-midipix*)
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         AC_DEFINE(GC_THREADS)
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         AC_DEFINE([_REENTRANT], [1],
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                   [Required define if using POSIX threads.])
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@@ -252,6 +252,10 @@
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         THREADDLLIBS=""
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         win32_threads=true
Lucio Andrés Illanes Albornoz (arab, vxp) 8a0f36
         ;;
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+      *-*-midipix*)
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+        # libpthread is part of libc
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+        THREADDLLIBS=""
Lucio Andrés Illanes Albornoz (arab, vxp) 8a0f36
+        ;;
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       *-*-mingw*)
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         AC_DEFINE(GC_WIN32_PTHREADS)
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         # Using pthreads-win32 (or other non-Cygwin pthreads) library.
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@@ -810,7 +814,7 @@
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        [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
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 #         ifdef __CYGWIN__
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 #           define _GNU_SOURCE 1
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-#         elif defined(__linux__) || defined(__GLIBC__) || defined(__GNU__)
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+#         elif defined(__linux__) || defined(__GLIBC__) || defined(__GNU__) || defined(__midipix__)
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 #           define _GNU_SOURCE 1
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 #         endif
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 #         include <pthread.h>