From 6288aa440c1ba111eaf52cf79659a25329205022 Mon Sep 17 00:00:00 2001
From: Orgad Shaneh <orgads@gmail.com>
Date: Thu, 12 Sep 2024 23:23:46 +0300
Subject: [PATCH] Build: Fix circular object deps with old GCC

When both -o and -MT are used, GCC 4.1 prints the object file twice in
the dependency file. e.g.:

foo.o foo.o: foo.c

If the file name is long, then the second occurrence moves to the next
line. e.g.:

ssl/statem/libssl-shlib-statem_dtls.o \
  ssl/statem/libssl-shlib-statem_dtls.o: ../ssl/statem/statem_dtls.c \

add-depends script scans one line at a time, so when the first line is
processed, the object file becomes a dependency itself.

Fix by removing -MT altogether.

This also fixes makedepend for nonstop platform.

Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25455)
---
 Configurations/unix-Makefile.tmpl | 2 +-
 NOTES-NONSTOP.md                  | 7 ++-----
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/Configurations/unix-Makefile.tmpl b/Configurations/unix-Makefile.tmpl
index 966d8fec89..09303c42df 100644
--- a/Configurations/unix-Makefile.tmpl
+++ b/Configurations/unix-Makefile.tmpl
@@ -1746,7 +1746,7 @@ EOF
       } elsif ($makedep_scheme eq 'gcc' && !grep /\.rc$/, @srcs) {
           $recipe .= <<"EOF";
 $obj: $deps
-	$cmd $incs $defs $cmdflags -MMD -MF $dep.tmp -MT \$\@ -c -o \$\@ $srcs
+	$cmd $incs $defs $cmdflags -MMD -MF $dep.tmp -c -o \$\@ $srcs
 	\@touch $dep.tmp
 	\@if cmp $dep.tmp $dep > /dev/null 2> /dev/null; then \\
 		rm -f $dep.tmp; \\
diff --git a/NOTES-NONSTOP.md b/NOTES-NONSTOP.md
index 3fc5bffb1c..30deed20b8 100644
--- a/NOTES-NONSTOP.md
+++ b/NOTES-NONSTOP.md
@@ -131,12 +131,9 @@ correctly, you also need the `COMP_ROOT` set, as in:
 
 `COMP_ROOT` needs to be in Windows form.
 
-`Configure` must specify the `no-makedepend` option otherwise errors will
-result when running the build because the c99 cross-compiler does not support
-the `gcc -MT` option. An example of a `Configure` command to be run from the
-OpenSSL directory is:
+An example of a `Configure` command to be run from the OpenSSL directory is:
 
-    ./Configure nonstop-nsx_64 no-makedepend --with-rand-seed=rdcpu
+    ./Configure nonstop-nsx_64 --with-rand-seed=rdcpu
 
 Do not forget to include any OpenSSL cross-compiling prefix and certificate
 options when creating your libraries.