[gcc r11-8770] libgomp: Don't include limits.h instead of hidden visibility block

[gcc r11-8770] libgomp: Don't include limits.h instead of hidden visibility block

[Jakub Jelinek]

https://gcc.gnu.org/g:122cdd5b2153cb8d3a70d426d557fc245144223e

commit r11-8770-g122cdd5b2153cb8d3a70d426d557fc245144223e
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Tue Jul 13 09:50:49 2021 +0200

    libgomp: Don't include limits.h instead of hidden visibility block
    
    sem.h is included in between # pragma GCC visibility push(hidden)
    and # pragma GCC visibility pop and includes limits.h there, which
    since the introduction of sysconf declaration in recent glibcs
    in there causes trouble.  libgomp assumes it is compiled by gcc,
    so we don't really need to include limits.h there and can use
    -__INT_MAX__ - 1 instead (which clang and icc support too for years).
    
    2021-07-13  Jakub Jelinek  <jakub@redhat.com>
                Florian Weimer  <fweimer@redhat.com>
    
            * config/linux/sem.h: Don't include limits.h.
            (SEM_WAIT): Define to -__INT_MAX__ - 1 instead of INT_MIN.
            * config/linux/affinity.c: Include limits.h.
    
    (cherry picked from commit 42f10ba5b57250506d69a0391ea7771c843ea286)

Diff:
---
 libgomp/config/linux/affinity.c | 1 +
 libgomp/config/linux/sem.h      | 4 +---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/libgomp/config/linux/affinity.c b/libgomp/config/linux/affinity.c
index c5abdce2387..1b636c61370 100644
--- a/libgomp/config/linux/affinity.c
+++ b/libgomp/config/linux/affinity.c
@@ -35,6 +35,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
+#include <limits.h>
 
 #ifdef HAVE_PTHREAD_AFFINITY_NP
 
diff --git a/libgomp/config/linux/sem.h b/libgomp/config/linux/sem.h
index bc0627d5e77..a3b0e267238 100644
--- a/libgomp/config/linux/sem.h
+++ b/libgomp/config/linux/sem.h
@@ -33,10 +33,8 @@
 #ifndef GOMP_SEM_H
 #define GOMP_SEM_H 1
 
-#include <limits.h> /* For INT_MIN */
-
 typedef int gomp_sem_t;
-#define SEM_WAIT INT_MIN
+#define SEM_WAIT (-__INT_MAX__ - 1)
 #define SEM_INC 1
 
 extern void gomp_sem_wait_slow (gomp_sem_t *, int);