Re: VAX Ultrix bootstrap failure: cc: -o would overwrite

["John David Anglin" <dave at hiauly1 dot hia dot nrc dot ca>]

> This causes us to maintain the warning flag list in two places, one in
> Makefile.in and one in configure.in.  A better scheme would be to use
> "sed" to remove -Wno-long-long from WARN_CFLAGS when gcc doesn't
> support it.  (Look at LOOSE_CFLAGS in gcc/Makefile.in for an example.)

The sed trick didn't work.  It resulted in multiple commands nested 
in backquotes.  As a compromise, I reverted to the patch enclosed.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)

--- configure.in.orig	Thu May 18 19:41:11 2000
+++ configure.in	Mon May 22 19:51:24 2000
@@ -322,18 +322,32 @@
 # Find the native compiler
 AC_PROG_CC
 AC_PROG_CC_C_O
-if test $ac_cv_prog_cc_${ac_cc}_c_o = no; then
+if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
   NO_MINUS_C_MINUS_O=yes
 fi
 AC_SUBST(NO_MINUS_C_MINUS_O)
 
 gcc_AC_C_LONG_DOUBLE
 
+AC_MSG_CHECKING(whether ${CC-cc} accepts -Wno-long-long)
+echo 'void f(){}' > conftest.c
+if test -z "`${CC-cc} -Wno-long-long -c conftest.c 2>&1`"; then
+  ac_cv_prog_cc_no_long_long=yes
+else
+  ac_cv_prog_cc_no_long_long=no
+fi
+rm -f conftest*
+echo "$ac_t"$ac_cv_prog_cc_no_long_long 1>&6
+
 # If the native compiler is GCC, we can enable warnings even in stage1.  
 # That's useful for people building cross-compilers, or just running a
 # quick `make'.
 if test "x$GCC" = "xyes"; then 
-  stage1_warn_cflags='$(WARN_CFLAGS)'
+  if test $ac_cv_prog_cc_no_long_long = yes; then
+    stage1_warn_cflags='$(WARN_CFLAGS) -Wno-long-long'
+  else
+    stage1_warn_cflags='$(WARN_CFLAGS)'
+  fi
 else
   stage1_warn_cflags=""
 fi
--- Makefile.in.orig	Fri May 19 23:02:45 2000
+++ Makefile.in	Mon May 22 19:49:28 2000
@@ -67,7 +67,8 @@
 # (And for stage 1 if the native compiler is GCC.)  It is
 # separate from BOOT_CFLAGS because people tend to override optimization
 # flags and we'd like them to still have warnings turned on.  They are free
-# to explicitly turn warnings off if they wish.
+# to explicitly turn warnings off if they wish.  -Wno-long-long is added
+# by configure to WARN_CFLAGS if the compiler used for stage1 supports it.
 # LOOSE_CFLAGS are the CFLAGS to use when compiling something which is only
 # compiled with gcc, such as libgcc and the frontends other than C.
 # XCFLAGS is used for most compilations but not when using the GCC just built.
@@ -76,7 +77,7 @@
 TCFLAGS =
 CFLAGS = -g @stage1_warn_cflags@
 BOOT_CFLAGS = -O2 $(CFLAGS)
-WARN_CFLAGS = -W -Wall -Wtraditional -pedantic -Wno-long-long -Wwrite-strings
+WARN_CFLAGS = -W -Wall -Wtraditional -pedantic -Wwrite-strings
 LOOSE_CFLAGS = `echo $(CFLAGS)|sed -e 's/-pedantic//g' -e 's/-Wtraditional//g'`
 # These exists to be overridden by the x-* and t-* files, respectively.
 X_CFLAGS =