This is a live mirror of the Perl 5 development currently hosted at
It seems that in Tru64 V5 gcc cannot be used to
authorJarkko Hietaniemi <>
Sat, 29 Mar 2003 07:23:00 +0000 (07:23 +0000)
committerJarkko Hietaniemi <>
Sat, 29 Mar 2003 07:23:00 +0000 (07:23 +0000)
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


index d203ded..b1305ba 100644 (file)
@@ -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
index 5b15fad..f08c318 100644 (file)
@@ -303,9 +303,32 @@ cat > UU/usethreads.cbu <<'EOCBU'
 # after it has prompted the user for whether to use threads.
 case "$usethreads" in
+       # 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;        
+       $cc -c pthread.c 2> pthread.err
+       if grep -q "unrecognized compiler" pthread.err; then
+           cat >&4 <<EOF
+*** I'm sorry but your C compiler ($cc) cannot be used to
+*** compile Perl with threads.  The system C compiler should work.
+Cannot continue, aborting.
+           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" ;;