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625492ee1a
* gnu/packages/patches/gcc-4-compile-with-gcc-5.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/gcc.scm (gcc-4.7): Use it.
65 lines
2.2 KiB
Diff
65 lines
2.2 KiB
Diff
Taken from https://gcc.gnu.org/cgi-bin/get-raw-msg?listname=gcc-patches&date=2016-01&msgid=1451802493-17406-1-git-send-email-vapier%40gentoo.org
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Since the 3.0.3 release of gperf (made in May 2007), the generated func
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has had the gnu_inline attribute applied to it. The gcc source however
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has not been updated to include that which has lead to a mismatch.
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In practice, this hasn't been an issue for two reasons:
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(1) Before gcc-5, the default standard was (gnu) C89, and gcc does not
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warn or throw an error in this mode.
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(2) Starting with gcc-4.8, the compiler driver used to build gcc was
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changed to C++, and g++ does not warn or throw an error in this mode.
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This error does show up though when using gcc-5 to build gcc-4.7 or
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older as then the default is (gnu) C11 and the C compiler driver is
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used. That failure looks like:
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In file included from .../gcc-4.7.4/gcc/cp/except.c:990:0:
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cfns.gperf: At top level:
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cfns.gperf:101:1: error: 'gnu_inline' attribute present on 'libc_name_p'
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cfns.gperf:26:14: error: but not here
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Whether the compiler should always emit this error regardless of the
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active standard or compiler driver is debatable (I think it should be
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consistent -- either always do it or never do it).
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2015-08-06 Mike Frysinger <vapier@gentoo.org>
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* cfns.gperf [__GNUC__, __GNUC_STDC_INLINE__]: Apply the
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__gnu_inline__ attribute.
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* cfns.h: Regenerated.
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---
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gcc/cp/cfns.gperf | 3 +++
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gcc/cp/cfns.h | 3 +++
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2 files changed, 6 insertions(+)
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diff --git a/gcc/cp/cfns.gperf b/gcc/cp/cfns.gperf
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index 68acd3d..953262f 100644
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--- a/gcc/cp/cfns.gperf
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+++ b/gcc/cp/cfns.gperf
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@@ -22,6 +22,9 @@ __inline
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static unsigned int hash (const char *, unsigned int);
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#ifdef __GNUC__
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__inline
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+#ifdef __GNUC_STDC_INLINE__
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+__attribute__ ((__gnu_inline__))
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+#endif
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#endif
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const char * libc_name_p (const char *, unsigned int);
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%}
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diff --git a/gcc/cp/cfns.h b/gcc/cp/cfns.h
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index 1c6665d..6d00c0e 100644
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--- a/gcc/cp/cfns.h
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+++ b/gcc/cp/cfns.h
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@@ -53,6 +53,9 @@ __inline
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static unsigned int hash (const char *, unsigned int);
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#ifdef __GNUC__
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__inline
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+#ifdef __GNUC_STDC_INLINE__
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+__attribute__ ((__gnu_inline__))
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+#endif
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#endif
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const char * libc_name_p (const char *, unsigned int);
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/* maximum key range = 391, duplicates = 0 */
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--
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2.6.2
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