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build: clang support

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This works with at least one version of clang
that existed at one moment in time.
No guarantees about clangs past or future.

To try:
        CC=clang all.bash

It does not work with the Xcode clang,
because that clang fails at printing a useful answer
to:
        clang -print-libgcc-file-name
The clang that works prints a full path name for
that command, not just "libgcc.a".

Fixes #4713.

R=iant, minux.ma
CC=golang-dev
https://golang.org/cl/7323068
This commit is contained in:
Russ Cox 2013-02-15 13:37:43 -08:00
parent 428c4cc8d4
commit 6d888f1e1b
8 changed files with 73 additions and 37 deletions
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2
include/libc.h
View file

@ -374,7 +374,7 @@ extern char* unsharp(char*);
/* command line */
extern char *argv0;
extern void __fixargv0(void);
#define ARGBEGIN for((argv0?0:(argv0=(__fixargv0(),*argv))),argv++,argc--;\
#define ARGBEGIN for((void)(argv0?0:(argv0=(__fixargv0(),*argv))),argv++,argc--;\
argv[0] && argv[0][0]=='-' && argv[0][1];\
argc--, argv++) {\
char *_args, *_argt;\