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authorMans Rullgard <mans@mansr.com>2012-10-15 02:38:17 +0100
committerMans Rullgard <mans@mansr.com>2012-10-23 12:01:18 +0100
commit4ebc6a74108f6c0448249b398ef33b25f3b16c0c (patch)
tree192b17707146db4caf896724cf89897de89a539b /compat
parent80521c1997a23e148edf89e11b939ab8646297ca (diff)
downloadffmpeg-streaming-4ebc6a74108f6c0448249b398ef33b25f3b16c0c.zip
ffmpeg-streaming-4ebc6a74108f6c0448249b398ef33b25f3b16c0c.tar.gz
build: Plan 9 support
This adds support for building on Plan 9 x86-32. The compat/plan9 directory contains these items: - replacements for the 'head' and 'printf' shell commands - wrapper for main() to disable FPU exceptions Larger required changes to the system are described in the documentation. Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'compat')
-rwxr-xr-xcompat/plan9/head10
-rw-r--r--compat/plan9/main.c34
-rwxr-xr-xcompat/plan9/printf2
3 files changed, 46 insertions, 0 deletions
diff --git a/compat/plan9/head b/compat/plan9/head
new file mode 100755
index 0000000..2840b2d
--- /dev/null
+++ b/compat/plan9/head
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+n=10
+
+case "$1" in
+ -n) n=$2; shift 2 ;;
+ -n*) n=${1#-n}; shift ;;
+esac
+
+exec sed ${n}q "$@"
diff --git a/compat/plan9/main.c b/compat/plan9/main.c
new file mode 100644
index 0000000..97d7067
--- /dev/null
+++ b/compat/plan9/main.c
@@ -0,0 +1,34 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+int plan9_main(int argc, char **argv);
+
+#undef main
+int main(int argc, char **argv)
+{
+ /* The setfcr() function in lib9 is broken, must use asm. */
+#ifdef __i386
+ short fcr;
+ __asm__ volatile ("fstcw %0 \n"
+ "or $63, %0 \n"
+ "fldcw %0 \n"
+ : "=m"(fcr));
+#endif
+
+ return plan9_main(argc, argv);
+}
diff --git a/compat/plan9/printf b/compat/plan9/printf
new file mode 100755
index 0000000..1a70a9e
--- /dev/null
+++ b/compat/plan9/printf
@@ -0,0 +1,2 @@
+#!/bin/sh
+exec awk "BEGIN { for (i = 2; i < ARGC; i++) printf \"$1\", ARGV[i] }" "$@"
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