[gcc r9-10087] libgomp: Don't include limits.h instead of hidden visibility block

[gcc r9-10087] libgomp: Don't include limits.h instead of hidden visibility block

[Jakub Jelinek]

https://gcc.gnu.org/g:120182aa1e6d21a830689175fd6ce0566b65ffeb

commit r9-10087-g120182aa1e6d21a830689175fd6ce0566b65ffeb
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 647d241b741..278101e31f2 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 b9283955cd4..b0335c05de9 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);