couple of changes to make Open MPI compile under Cygwin with gcc:

- add the right asm format
  - add checks for some constants / fields that cygwin
    doesn't have in the stacktrace code
  - fix for slightly more verbose libtool 2 betas that
    have multiple lines for link output

This commit was SVN r8501.

config/ompi_get_libtool_linker_flags.m4

@@ -50,7 +50,7 @@ ompi_check_linker_flags_work() {
     OMPI_LOG_MSG([$cmd], [yes])
     eval $cmd >&5 2>&5
     if test -n "[$]1"; then
-	output="`eval $cmd 2>/dev/null`"
+	output="`eval $cmd 2>/dev/null | head -n 1`"
     fi
     status="$?"
     OMPI_LOG_MSG([\$? = $status], [yes])
@@ -80,7 +80,10 @@ eval "set $output"
 extra_ldflags=
 while test -n "[$]1"; do
     case "[$]1" in
+    libtool:) ;;
+    link:) ;;
     $CC) ;;
+    .libs/bar*) ;;
     bar*) ;;
     -I*) ;;
     -L*) ;;

configure.ac

@@ -1124,6 +1124,7 @@ AC_CHECK_MEMBERS([struct dirent.d_type], [], [], [
 #include <dirent.h>])
 
 AC_CHECK_MEMBERS([siginfo_t.si_fd],,,[#include <signal.h>])
+AC_CHECK_MEMBERS([siginfo_t.si_band],,,[#include <signal.h>])
 
 
 # checkpoint results

opal/asm/asm-data.txt

@@ -45,6 +45,7 @@ AMD64	default-.text-.globl-:--.L-@-1-0-1-1	amd64-linux
 
 IA32	default-.text-.globl-:--.L-@-1-0-1-1	ia32-linux
 IA32	default-.text-.globl-:-_-L--0-1-1-1	ia32-osx
+IA32	default-.text-.globl-:-_-L--0-0-1-1	ia32-cygwin
 
 
 ######################################################################

opal/util/stacktrace.c

@@ -199,12 +199,24 @@ static void opal_show_stackframe (int signo, siginfo_t * info, void * p)
       case SIGPOLL:
         switch (info->si_code)
           {
+#ifdef POLL_IN
              case POLL_IN: str = "POLL_IN"; break;
+#endif
+#ifdef POLL_OUT
              case POLL_OUT: str = "POLL_OUT"; break;
+#endif
+#ifdef POLL_MSG
              case POLL_MSG: str = "POLL_MSG"; break;
+#endif
+#ifdef POLL_ERR
              case POLL_ERR: str = "POLL_ERR"; break;
+#endif
+#ifdef POLL_PRI
              case POLL_PRI: str = "POLL_PRI"; break;
+#endif
+#ifdef POLL_HUP
              case POLL_HUP: str = "POLL_HUP"; break;
+#endif
           }
         break;
 #endif /* SIGPOLL */
@@ -262,9 +274,11 @@ static void opal_show_stackframe (int signo, siginfo_t * info, void * p)
 #ifdef HAVE_SIGINFO_T_SI_FD
         ret = snprintf (tmp, size, "si_band:%ld si_fd:%d\n",
                         info->si_band, info->si_fd);
-#else
+#elif HAVE_SIGINFO_T_SI_BAND
         ret = snprintf (tmp, size, "si_band:%ld\n",
                         info->si_band);
+#else
+        size = 0;
 #endif
         size -= ret;
         tmp += ret;