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Re: PATCH: compstate[nmatches]

In article <199910130946.LAA12312@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
  Sven Wischnowsky <wischnow@xxxxxxxxxxxxxxxxxxxxxxx> writes:

> -static int nmatches, smatches;
> +/**/
> +int nmatches, smatches;

>      VARARR(int, mlens, nmatches + 1);

This change tickle a gcc bug.

% gcc -c -I. -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DHAVE_CONFIG_H -DMODULE -Wall -Wno-implicit -Wmissing-prototypes -ggdb -fpic -o zle_tricky..o zle_tricky.c
zle_tricky.c: In function `calclist':
zle_tricky.c:8804: size of array `mlens' is too large
zle_tricky.c:8804: warning: unused variable `mlens'

It is reproducible with more simple program as:

Z(2):akr@is27e1u11% cat tst.c
int num;

void fun(void)
  int arr[num + 1];
Z(2):akr@is27e1u11% gcc -c tst.c
tst.c: In function `fun':
tst.c:5: size of array `arr' is too large
zsh: exit 1     gcc -c tst.c

At least, gcc-2.8.1 and 2.95.1 has the problem.
But gcc- has no problem.

Although I sent a bug report to gcc developpers, zsh should check it.

Index: configure.in
RCS file: /projects/zsh/zsh/configure.in,v
retrieving revision
diff -u -F^( -r1.1.1.28 configure.in
--- configure.in	1999/10/06 19:45:06
+++ configure.in	1999/10/13 18:53:55
@@ -367,7 +367,7 @@
 dnl Checking if the compiler supports variable-length arrays
 AC_CACHE_CHECK(if the compiler supports variable-length arrays,
-[AC_TRY_COMPILE([int foo();], [int i[foo()];],
+[AC_TRY_COMPILE([int foo(), n;], [int i[foo()], a[n+1];],
 if test $zsh_cv_c_variable_length_arrays = yes; then
Tanaka Akira

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