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https://github.com/edk2-porting/linux-next.git
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6c4798d3f0
Disable a couple of compilation warnings (which are treated as errors) on strlcpy() definition and declaration, allowing users to compile perf and kernel (objtool) when: 1. glibc have strlcpy() (such as in ALT Linux since 2004) objtool and perf build fails with this (in gcc): In file included from exec-cmd.c:3: tools/include/linux/string.h:20:15: error: redundant redeclaration of ‘strlcpy’ [-Werror=redundant-decls] 20 | extern size_t strlcpy(char *dest, const char *src, size_t size); 2. clang ignores `-Wredundant-decls', but produces another warning when building perf: CC util/string.o ../lib/string.c:99:8: error: attribute declaration must precede definition [-Werror,-Wignored-attributes] size_t __weak strlcpy(char *dest, const char *src, size_t size) ../../tools/include/linux/compiler.h:66:34: note: expanded from macro '__weak' # define __weak __attribute__((weak)) /usr/include/bits/string_fortified.h:151:8: note: previous definition is here __NTH (strlcpy (char *__restrict __dest, const char *__restrict __src, Committer notes: The #pragma GCC diagnostic directive was introduced in gcc 4.6, so check for that as well. Fixes:ce99091
("perf tools: Move strlcpy() from perf to tools/lib/string.c") Fixes:0215d59
("tools lib: Reinstate strlcpy() header guard with __UCLIBC__") Resolves: https://bugzilla.kernel.org/show_bug.cgi?id=118481 Signed-off-by: Vitaly Chikunov <vt@altlinux.org> Reviewed-by: Dmitry Levin <ldv@altlinux.org> Cc: Dmitry Levin <ldv@altlinux.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: kbuild test robot <lkp@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: stable@vger.kernel.org Cc: Vineet Gupta <vineet.gupta1@synopsys.com> Link: http://lore.kernel.org/lkml/20191224172029.19690-1-vt@altlinux.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TOOLS_LINUX_STRING_H_
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#define _TOOLS_LINUX_STRING_H_
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#include <linux/types.h> /* for size_t */
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#include <string.h>
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void *memdup(const void *src, size_t len);
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char **argv_split(const char *str, int *argcp);
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void argv_free(char **argv);
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int strtobool(const char *s, bool *res);
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/*
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* glibc based builds needs the extern while uClibc doesn't.
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* However uClibc headers also define __GLIBC__ hence the hack below
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*/
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#if defined(__GLIBC__) && !defined(__UCLIBC__)
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// pragma diagnostic was introduced in gcc 4.6
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wredundant-decls"
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#endif
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extern size_t strlcpy(char *dest, const char *src, size_t size);
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
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#pragma GCC diagnostic pop
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#endif
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#endif
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char *str_error_r(int errnum, char *buf, size_t buflen);
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char *strreplace(char *s, char old, char new);
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/**
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* strstarts - does @str start with @prefix?
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* @str: string to examine
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* @prefix: prefix to look for.
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*/
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static inline bool strstarts(const char *str, const char *prefix)
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{
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return strncmp(str, prefix, strlen(prefix)) == 0;
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}
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extern char * __must_check skip_spaces(const char *);
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extern char *strim(char *);
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#endif /* _TOOLS_LINUX_STRING_H_ */
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