[SCM] GNU Autoconf source repository branch, master, updated. v2.69-34-g55ccec0

[Paul Eggert]

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- Log -----------------------------------------------------------------
commit 55ccec071bea6bb7f08c4bbbf7d223c6892b5cdc
Author: Paul Eggert <address@hidden>
Date:   Wed Sep 26 07:49:59 2012 -0700

    AC_PROG_CC: try -qlanglvl=extc1x, for IBM XL C V12.1
    
    * lib/autoconf/c.m4 (_AC_PROG_CC_C11): Add -qlanglvl=extc1x, for
    IBM XL C V12.1.  It shouldn't pass the C11 test yet, since it's not
    documented to support _Alignas, _Alignof, UTF-8 string literals,
    and duplicate typedefs, but presumably it will eventually.

-----------------------------------------------------------------------

Summary of changes:
 lib/autoconf/c.m4 |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/lib/autoconf/c.m4 b/lib/autoconf/c.m4
index 808c104..0309416 100644
--- a/lib/autoconf/c.m4
+++ b/lib/autoconf/c.m4
@@ -1347,7 +1347,7 @@ AC_DEFUN([_AC_PROG_CC_C99],
 [_AC_C_C99_TEST_BODY],
 dnl Try
 dnl GCC                -std=gnu99 (unused restrictive modes: -std=c99 
-std=iso9899:1999)
-dnl AIX                -qlanglvl=extc99 (unused restrictive mode: 
-qlanglvl=stdc99)
+dnl IBM XL C   -qlanglvl=extc99 (unused restrictive mode: -qlanglvl=stdc99)
 dnl HP cc      -AC99
 dnl Intel ICC  -std=c99, -c99 (deprecated)
 dnl IRIX       -c99
@@ -1432,8 +1432,9 @@ struct anonymous
 ]],
 dnl Try
 dnl GCC                -std=gnu11 (unused restrictive mode: -std=c11)
+dnl IBM XL C   -qlanglvl=extc1x (no extc11 or (unused) stdc11 in V12.1)
 dnl with extended modes being tried first.
-[[-std=gnu11]], [$1], [$2])[]dnl
+[[-std=gnu11 -qlanglvl=extc1x]], [$1], [$2])[]dnl
 ])# _AC_PROG_CC_C11
 
 
@@ -1740,7 +1741,7 @@ AC_DEFUN([AC_C_CONST],
   /* NEC SVR4.0.2 mips cc rejects this.  */
   struct point {int x, y;};
   static struct point const zero = {0,0};
-  /* AIX XL C 1.02.0.0 rejects this.
+  /* IBM XL C 1.02.0.0 rejects this.
      It does not let you subtract one const X* pointer from another in
      an arm of an if-expression whose if-part is not a constant
      expression */
@@ -1768,7 +1769,7 @@ AC_DEFUN([AC_C_CONST],
     iptr p = 0;
     ++p;
   }
-  { /* AIX XL C 1.02.0.0 rejects this sort of thing, saying
+  { /* IBM XL C 1.02.0.0 rejects this sort of thing, saying
        "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
     struct s { int j; const int *ap[3]; } bx;
     struct s *b = &bx; b->j = 5;
@@ -2064,7 +2065,7 @@ AC_DEFUN([AC_OPENMP],
          dnl   Intel C              -openmp
          dnl   SGI C, PGI C         -mp
          dnl   Tru64 Compaq C       -omp
-         dnl   IBM C (AIX, Linux)   -qsmp=omp
+         dnl   IBM XL C (AIX, Linux) -qsmp=omp
           dnl   Cray CCE             -homp
           dnl   NEC SX               -Popenmp
           dnl   Lahey Fortran (Linux)  --openmp


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