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musl does not provice feenableexcept and fedisableexcept. Those calls have
only been used on linux so far. This patch extends the #ifdef logic to only use
them on Linux if additionally glibc is used.
--- occt-V7_4_0-org/src/OSD/OSD_signal.cxx
+++ occt-V7_4_0/src/OSD/OSD_signal.cxx
@@ -678,7 +678,7 @@
// POSIX threads
#include <pthread.h>
-#ifdef __linux__
+#ifdef __linux__ && defined(__GLIBC__)
#include <cfenv>
//#include <fenv.h>
#endif
@@ -793,7 +793,7 @@
case SIGFPE:
sigaddset(&set, SIGFPE);
sigprocmask(SIG_UNBLOCK, &set, NULL) ;
-#ifdef __linux__
+#ifdef __linux__ && defined(__GLIBC__)
OSD::SetFloatingSignal (Standard_True);
#endif
#if (!defined (__sun)) && (!defined(SOLARIS))
@@ -914,7 +914,7 @@
//=======================================================================
void OSD::SetFloatingSignal (Standard_Boolean theFloatingSignal)
{
-#if defined (__linux__)
+#if defined (__linux__) && defined(__GLIBC__)
feclearexcept (FE_ALL_EXCEPT);
if (theFloatingSignal)
{
@@ -947,7 +947,7 @@
//=======================================================================
Standard_Boolean OSD::ToCatchFloatingSignals()
{
-#if defined (__linux__)
+#if defined (__linux__) && defined(__GLIBC__)
return (fegetexcept() & _OSD_FPX) != 0;
#else
return Standard_False;
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