From 89ca3ac89c106f0b7486d3aa6353bea68cc610e8 Mon Sep 17 00:00:00 2001
From: Albert Ou <aou@eecs.berkeley.edu>
Date: Thu, 2 Jan 2020 18:11:32 -0800
Subject: [PATCH] Fix non-portable operator in shell conditional

Use = to compare strings with the test builtin command instead of ==,
which is non-standard and sometimes unsupported by stricter POSIX shells
(e.g., dash as /bin/sh).
---
 Makefile.in | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Makefile.in b/Makefile.in
index 8976e032..a472d2fa 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -263,7 +263,7 @@ endif
 
 stamps/build-gcc-linux-stage1: $(GCC_SRCDIR) stamps/build-binutils-linux \
                                stamps/build-linux-headers
-	if test -f $</contrib/download_prerequisites && test "@NEED_GCC_EXTERNAL_LIBRARIES@" == "true"; then cd $< && ./contrib/download_prerequisites; fi
+	if test -f $</contrib/download_prerequisites && test "@NEED_GCC_EXTERNAL_LIBRARIES@" = "true"; then cd $< && ./contrib/download_prerequisites; fi
 	rm -rf $@ $(notdir $@)
 	mkdir $(notdir $@)
 	cd $(notdir $@) && $</configure \
@@ -425,7 +425,7 @@ stamps/build-gdb-newlib: $(GDB_SRCDIR)
 	mkdir -p $(dir $@) && touch $@
 
 stamps/build-gcc-newlib-stage1: $(GCC_SRCDIR) stamps/build-binutils-newlib
-	if test -f $</contrib/download_prerequisites && test "@NEED_GCC_EXTERNAL_LIBRARIES@" == "true"; then cd $< && ./contrib/download_prerequisites; fi
+	if test -f $</contrib/download_prerequisites && test "@NEED_GCC_EXTERNAL_LIBRARIES@" = "true"; then cd $< && ./contrib/download_prerequisites; fi
 	rm -rf $@ $(notdir $@)
 	mkdir $(notdir $@)
 	cd $(notdir $@) && $</configure \
@@ -581,7 +581,7 @@ stamps/build-binutils-musl: $(BINUTILS_SRCDIR) stamps/check-write-permission
 
 stamps/build-gcc-musl-stage1: $(GCC_SRCDIR) stamps/build-binutils-musl \
                                stamps/build-linux-headers
-	if test -f $</contrib/download_prerequisites && test "@NEED_GCC_EXTERNAL_LIBRARIES@" == "true"; then cd $< && ./contrib/download_prerequisites; fi
+	if test -f $</contrib/download_prerequisites && test "@NEED_GCC_EXTERNAL_LIBRARIES@" = "true"; then cd $< && ./contrib/download_prerequisites; fi
 	rm -rf $@ $(notdir $@)
 	mkdir $(notdir $@)
 	cd $(notdir $@) && $</configure \