[SCM] gawk branch, gawk-5.1-stable, updated. gawk-4.1.0-4295-g1268bb3

[Arnold Robbins]

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- Log -----------------------------------------------------------------
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=1268bb345a96f3a11dc9d42f7580fffc264401a6

commit 1268bb345a96f3a11dc9d42f7580fffc264401a6
Author: Arnold D. Robbins <arnold@skeeve.com>
Date:   Thu Sep 9 22:16:06 2021 +0300

    Fix in configure.ac.

diff --git a/configh.in b/configh.in
index f5c227b..885dd00 100644
--- a/configh.in
+++ b/configh.in
@@ -34,6 +34,9 @@
    the CoreFoundation framework. */
 #undef HAVE_CFPREFERENCESCOPYAPPVALUE
 
+/* Define to 1 if C supports variable-length arrays. */
+#undef HAVE_C_VARARRAYS
+
 /* Define if the GNU dcgettext() function is already present or preinstalled.
    */
 #undef HAVE_DCGETTEXT
@@ -519,6 +522,10 @@
 # undef __CHAR_UNSIGNED__
 #endif
 
+/* Define to 1 if C does not support variable-length arrays, and if the
+   compiler does not already define this. */
+#undef __STDC_NO_VLA__
+
 /* Define to empty if `const' does not conform to ANSI C. */
 #undef const
 
diff --git a/configure b/configure
index 225b5f6..72a1699 100755
--- a/configure
+++ b/configure
@@ -6376,7 +6376,221 @@ else
 fi
 
 
-AC_C_VARARRAY
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext 
$LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to run the C 
preprocessor" >&5
+printf %s "checking how to run the C preprocessor... " >&6; }
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+  CPP=
+fi
+if test -z "$CPP"; then
+  if test ${ac_cv_prog_CPP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+      # Double quotes because $CC needs to be expanded
+    for CPP in "$CC -E" "$CC -E -traditional-cpp" cpp /lib/cpp
+    do
+      ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+                    Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+
+else $as_nop
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+  # Broken: success on invalid input.
+continue
+else $as_nop
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok
+then :
+  break
+fi
+
+    done
+    ac_cv_prog_CPP=$CPP
+
+fi
+  CPP=$ac_cv_prog_CPP
+else
+  ac_cv_prog_CPP=$CPP
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
+printf "%s\n" "$CPP" >&6; }
+ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+                    Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+
+else $as_nop
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+  # Broken: success on invalid input.
+continue
+else $as_nop
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok
+then :
+
+else $as_nop
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext 
$LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for variable-length 
arrays" >&5
+printf %s "checking for variable-length arrays... " >&6; }
+if test ${ac_cv_c_vararrays+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __STDC_NO_VLA__
+       defined
+       #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "defined" >/dev/null 2>&1
+then :
+  ac_cv_c_vararrays='no: __STDC_NO_VLA__ is defined'
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Test for VLA support.  This test is partly inspired
+                 from examples in the C standard.  Use at least two VLA
+                 functions to detect the GCC 3.4.3 bug described in:
+                 
https://lists.gnu.org/archive/html/bug-gnulib/2014-08/msg00014.html
+                 */
+              #ifdef __STDC_NO_VLA__
+               syntax error;
+              #else
+                extern int n;
+                int B[100];
+                int fvla (int m, int C[m][m]);
+
+                int
+                simple (int count, int all[static count])
+                {
+                  return all[count - 1];
+                }
+
+                int
+                fvla (int m, int C[m][m])
+                {
+                  typedef int VLA[m][m];
+                  VLA x;
+                  int D[m];
+                  static int (*q)[m] = &B;
+                  int (*s)[n] = q;
+                  return C && &x[0][0] == &D[0] && &D[0] == s[0];
+                }
+              #endif
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_vararrays=yes
+else $as_nop
+  ac_cv_c_vararrays=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -rf conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_vararrays" >&5
+printf "%s\n" "$ac_cv_c_vararrays" >&6; }
+  if test "$ac_cv_c_vararrays" = yes; then
+
+printf "%s\n" "#define HAVE_C_VARARRAYS 1" >>confdefs.h
+
+  elif test "$ac_cv_c_vararrays" = no; then
+
+printf "%s\n" "#define __STDC_NO_VLA__ 1" >>confdefs.h
+
+  fi
+
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -7226,7 +7440,6 @@ fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if we are using EBCDIC" 
>&5
 printf %s "checking if we are using EBCDIC... " >&6; }
-
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #if 'a' == 0x81
diff --git a/configure.ac b/configure.ac
index aea7c97..5cf327f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -98,7 +98,7 @@ AC_PROG_EGREP
 AC_PROG_YACC
 AC_PROG_LN_S
 AC_PROG_CC
-AC_C_VARARRAY
+AC_C_VARARRAYS
 AC_PROG_CPP
 AC_PROG_RANLIB
 

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

Summary of changes:
 configh.in   |   7 ++
 configure    | 217 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 configure.ac |   2 +-
 3 files changed, 223 insertions(+), 3 deletions(-)


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