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Silence MSVC warnings about redefinition of isnan

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Some versions of perl.h define isnan when the compiler is MSVC. To avoid
warnings about this, undefine the symbol before including perl.h and
re-add the definition afterwards if it wasn't recreated.

Discussion: https://postgr.es/m/caf0568e-3c1f-07fd-6914-d903f22560f2@2ndQuadrant.com
This commit is contained in:
Andrew Dunstan 2018-11-18 12:36:31 -05:00
parent 0b59b0e8bc
commit d5d7f7f3b7
1 changed files with 13 additions and 1 deletions
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14
src/pl/plperl/plperl.h
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@ -40,10 +40,15 @@
/*
* ActivePerl 5.18 and later are MinGW-built, and their headers use GCC's
* __inline__. Translate to something MSVC recognizes.
* __inline__. Translate to something MSVC recognizes. Also, perl.h sometimes
* defines isnan, so undefine it here and put back the definition later if
* perl.h doesn't.
*/
#ifdef _MSC_VER
#define __inline__ inline
#ifdef isname
#undef isnan
#endif
#endif
/*
@ -135,6 +140,13 @@
#define vprintf pg_vprintf
#define printf(...) pg_printf(__VA_ARGS__)
/* put back the definition of isnan if needed */
#ifdef _MSC_VER
#ifndef isnan
#define isnan(x) _isnan(x)
#endif
#endif
/* perl version and platform portability */
#define NEED_eval_pv
#define NEED_newRV_noinc