From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Sat, 29 Mar 2003 07:23:00 +0000 (+0000)
Subject: It seems that in Tru64 V5 gcc cannot be used to
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=700a71f52a8b687cd8507393838281605745411c;p=p5sagit%2Fp5-mst-13.2.git

It seems that in Tru64 V5 gcc cannot be used to
compile a threaded Perl because <pthread.h> explicitly
checks for supported compilers (gcc not being one of them).
This is not so bad since the system C compiler is always there.

p4raw-id: //depot/perl@19078
---

diff --git a/README.tru64 b/README.tru64
index d203ded..b1305ba 100644
--- a/README.tru64
+++ b/README.tru64
@@ -50,6 +50,11 @@ Perl threading is going to work only in Tru64 4.0 and newer releases,
 older operating releases like 3.2 aren't probably going to work
 properly with threads.
 
+In Tru64 V5 (at least V5.1A, V5.1B) you cannot build threaded Perl with gcc
+because the system header <pthread.h> explicitly checks for supported
+C compilers, gcc (at least 3.2.2) not being one of them.  But the
+system C compiler should work just fine.
+
 =head2 Long Doubles on Tru64
 
 You cannot Configure Perl to use long doubles unless you have at least
diff --git a/hints/dec_osf.sh b/hints/dec_osf.sh
index 5b15fad..f08c318 100644
--- a/hints/dec_osf.sh
+++ b/hints/dec_osf.sh
@@ -303,9 +303,32 @@ cat > UU/usethreads.cbu <<'EOCBU'
 # after it has prompted the user for whether to use threads.
 case "$usethreads" in
 $define|true|[yY]*)
+	# In Tru64 V5 (at least V5.1A, V5.1B) gcc (at least 3.2.2)
+	# cannot be used to compile a threaded Perl.
+	cat > pthread.c <<EOF
+#include <pthread.h>
+extern int foo;	
+EOF
+	$cc -c pthread.c 2> pthread.err
+	if grep -q "unrecognized compiler" pthread.err; then
+	    cat >&4 <<EOF
+***
+*** I'm sorry but your C compiler ($cc) cannot be used to
+*** compile Perl with threads.  The system C compiler should work.
+***
+
+Cannot continue, aborting.
+
+EOF
+	    rm -f pthread.*
+	    exit 1
+	fi
+	rm -f pthread.*
 	# Threads interfaces changed with V4.0.
 	case "$isgcc" in
-	gcc)	ccflags="-D_REENTRANT $ccflags" ;;
+	gcc)
+	    ccflags="-D_REENTRANT $ccflags"
+	    ;;
 	*)  case "`uname -r`" in
 	    *[123].*)	ccflags="-threads $ccflags" ;;
 	    *)          ccflags="-pthread $ccflags" ;;