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portability: don't use _Pragma with ICC

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ICC defines __GNUC__ [1], but does not support GCC's _Pragma for
diagnostics.  As a matter of fact, I believe it does not support
_Pragma at all (only #pragma) [2].

Reported by Maxim Prohorenko.
https://savannah.gnu.org/support/index.php?108339

[1] https://software.intel.com/en-us/cpp-compiler-18.0-developer-guide-and-reference-gcc-compatibility-and-interoperability
[2] https://software.intel.com/en-us/cpp-compiler-18.0-developer-guide-and-reference-pragmas

* data/c.m4 (YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN): Exclude ICC from
the club.
This commit is contained in:
Akim Demaille
2018-08-18 11:27:24 +02:00
parent 005ea24cbb
commit 5010af94d0
3 changed files with 7 additions and 1 deletions
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2
data/c.m4
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@@ -242,7 +242,7 @@ m4_define([b4_attribute_define],
# define YYUSE(E) /* empty */
#endif
#if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
#if defined __GNUC__ && ! defined __ICC && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
/* Suppress an incorrect diagnostic about yylval being uninitialized. */
# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
_Pragma ("GCC diagnostic push") \