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[doc] Update plugin doc

Message ID 000001cf0c47$897a78f0$9c6f6ad0$@arm.com
State New
Headers show

Commit Message

Joey Ye Jan. 8, 2014, 7:59 a.m. UTC 
Update plugin document after switching to C++, also make it more friendly to
cross-build.

ChangeLog:
    2014-01-08  Joey Ye  <joey.ye@arm.com>
    doc/plugin.texi (Building GCC plugins): Update to C++.

OK to trunk?
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Patch

diff --git a/gcc/doc/plugins.texi b/gcc/doc/plugins.texi
index fc2d754..e668de6 100644
--- a/gcc/doc/plugins.texi
+++ b/gcc/doc/plugins.texi
@@ -465,18 +465,18 @@  integer numbers, so a plugin could ensure it is built
for GCC 4.7 with
 The following GNU Makefile excerpt shows how to build a simple plugin:
 
 @smallexample
-GCC=gcc
-PLUGIN_SOURCE_FILES= plugin1.c plugin2.c
-PLUGIN_OBJECT_FILES= $(patsubst %.c,%.o,$(PLUGIN_SOURCE_FILES))
-GCCPLUGINS_DIR:= $(shell $(GCC) -print-file-name=plugin)
-CFLAGS+= -I$(GCCPLUGINS_DIR)/include -fPIC -O2
-
-plugin.so: $(PLUGIN_OBJECT_FILES)
-   $(GCC) -shared $^ -o $@@
+HOST_GCC=g++
+TARGET_GCC=gcc
+PLUGIN_SOURCE_FILES= plugin1.c plugin2.cc
+GCCPLUGINS_DIR:= $(shell $(TARGET_GCC) -print-file-name=plugin)
+CXXFLAGS+= -I$(GCCPLUGINS_DIR)/include -fPIC -fno-rtti -O2
+
+plugin.so: $(PLUGIN_SOURCE_FILES)
+   $(HOST_GCC) -shared $(CXXFLAGS) $^ -o $@@
 @end smallexample
 
-A single source file plugin may be built with @code{gcc -I`gcc
--print-file-name=plugin`/include -fPIC -shared -O2 plugin.c -o
+A single source file plugin may be built with @code{g++ -I`gcc
+-print-file-name=plugin`/include -fPIC -shared -fno-rtti -O2 plugin.c -o
 plugin.so}, using backquote shell syntax to query the @file{plugin}
 directory.