Reviewers: Jakob,
Message:
After I set up a Gentoo X32 environment by following
http://www.gentoo.org/doc/en/handbook/handbook-amd64.xml and selecting
stage3-x32-20130627.tar.bz2, I found x64.release could not be built
successfully. The reason is that the default gcc compiler is for X32 in the
stage3-x32-20130627 and we need -m64 to make x64.release.
It is very straightforward to set up a Gentoo X32 environment by following
their
installation guide. If you want to have a try, make sure "CONFIG_X86_X32=y"
and
"CONFIG_DEVTMPFS=y" are set when configuring the Linux kernel.
Description:
Introduce -m64 flag for making x64 when the default gcc compiler is for X32
Please review this at https://codereview.chromium.org/18211004/
SVN Base: http://v8.googlecode.com/svn/branches/bleeding_edge/
Affected files:
M build/common.gypi
Index: build/common.gypi
===================================================================
--- build/common.gypi (revision 15407)
+++ build/common.gypi (working copy)
@@ -452,6 +452,26 @@
}],
],
}],
+ ['(OS=="linux") and (v8_target_arch=="x64")', {
+ # Check whether the host compiler and target compiler support the
+ # '-m64' option and set it if so.
+ 'target_conditions': [
+ ['_toolset=="host"', {
+ 'variables': {
+ 'm64flag': '<!((echo | $(echo ${CXX_host:-$(which g++)})
-m64 -E - > /dev/null 2>&1) && echo "-m64" || true)',
+ },
+ 'cflags': [ '<(m64flag)' ],
+ 'ldflags': [ '<(m64flag)' ],
+ }],
+ ['_toolset=="target"', {
+ 'variables': {
+ 'm64flag': '<!((echo | $(echo ${CXX_target:-<(CXX)}) -m64 -E
- > /dev/null 2>&1) && echo "-m64" || true)',
+ },
+ 'cflags': [ '<(m64flag)' ],
+ 'ldflags': [ '<(m64flag)' ],
+ }]
+ ],
+ }],
['OS=="freebsd" or OS=="openbsd"', {
'cflags': [ '-I/usr/local/include' ],
}],
--
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