gnu/packages/patches/gcc-4-compile-with-gcc-5.patch

   1 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
   2
   3 Since the 3.0.3 release of gperf (made in May 2007), the generated func
   4 has had the gnu_inline attribute applied to it.  The gcc source however
   5 has not been updated to include that which has lead to a mismatch.
   6
   7 In practice, this hasn't been an issue for two reasons:
   8 (1) Before gcc-5, the default standard was (gnu) C89, and gcc does not
   9 warn or throw an error in this mode.
  10 (2) Starting with gcc-4.8, the compiler driver used to build gcc was
  11 changed to C++, and g++ does not warn or throw an error in this mode.
  12
  13 This error does show up though when using gcc-5 to build gcc-4.7 or
  14 older as then the default is (gnu) C11 and the C compiler driver is
  15 used.  That failure looks like:
  16 In file included from .../gcc-4.7.4/gcc/cp/except.c:990:0:
  17 cfns.gperf: At top level:
  18 cfns.gperf:101:1: error: 'gnu_inline' attribute present on 'libc_name_p'
  19 cfns.gperf:26:14: error: but not here
  20
  21 Whether the compiler should always emit this error regardless of the
  22 active standard or compiler driver is debatable (I think it should be
  23 consistent -- either always do it or never do it).
  24
  25 2015-08-06  Mike Frysinger  <vapier@gentoo.org>
  26
  27         * cfns.gperf [__GNUC__, __GNUC_STDC_INLINE__]: Apply the
  28         __gnu_inline__ attribute.
  29         * cfns.h: Regenerated.
  30 ---
  31  gcc/cp/cfns.gperf | 3 +++
  32  gcc/cp/cfns.h     | 3 +++
  33  2 files changed, 6 insertions(+)
  34
  35 diff --git a/gcc/cp/cfns.gperf b/gcc/cp/cfns.gperf
  36 index 68acd3d..953262f 100644
  37 --- a/gcc/cp/cfns.gperf
  38 +++ b/gcc/cp/cfns.gperf
  39 @@ -22,6 +22,9 @@ __inline
  40  static unsigned int hash (const char *, unsigned int);
  41  #ifdef __GNUC__
  42  __inline
  43 +#ifdef __GNUC_STDC_INLINE__
  44 +__attribute__ ((__gnu_inline__))
  45 +#endif
  46  #endif
  47  const char * libc_name_p (const char *, unsigned int);
  48  %}
  49 diff --git a/gcc/cp/cfns.h b/gcc/cp/cfns.h
  50 index 1c6665d..6d00c0e 100644
  51 --- a/gcc/cp/cfns.h
  52 +++ b/gcc/cp/cfns.h
  53 @@ -53,6 +53,9 @@ __inline
  54  static unsigned int hash (const char *, unsigned int);
  55  #ifdef __GNUC__
  56  __inline
  57 +#ifdef __GNUC_STDC_INLINE__
  58 +__attribute__ ((__gnu_inline__))
  59 +#endif
  60  #endif
  61  const char * libc_name_p (const char *, unsigned int);
  62  /* maximum key range = 391, duplicates = 0 */
  63 --
  64 2.6.2
  65