macOS: Create folder with gsed symlink

Black magic for macOS. The problem is that default sed on macOS is not
compatible with GNU, while some scripts use GNU-specific extensions. GNU sed
can be installed with Homebrew, but by default it will have a name `gsed`,
so scripts should be modified to use it. While this can be done in ARC
scripts, we don't have full control over other projects, Linux in
particular, which also require GNU sed. Therefore in followind lines a new
directory is created, a link named `sed` is created and is pointed to `gsed`
and directory is added to the PATH, so GNU sed will be used by Linux.
Alternative solution would be to install GNU sed as `sed` in Homebrew,
however that might have some negative effect on other applications, so I
don't think it is wise to require this from the user.

Signed-off-by: Anton Kolesov <[email protected]>

Author: anthony-kolesov

build-uclibc.sh

@@ -245,6 +245,24 @@ DEFCFG_DIR=$ARC_GNU/uClibc/extra/Configs/defconfigs/arc/
 rm -rf "$build_dir"
 mkdir -p "$build_dir"
 
+# -----------------------------------------------------------------------------
+# Black magic for macOS. The problem is that default sed on macOS is not
+# compatible with GNU, while some scripts use GNU-specific extensions. GNU sed
+# can be installed with Homebrew, but by default it will have a name `gsed`, so
+# scripts should be modified to use it. While this can be done in ARC scripts,
+# we don't have full control over other projects, Linux in particular, which
+# also require GNU sed. Therefore in followind lines a new directory is
+# created, a link named `sed` is created and is pointed to `gsed` and directory
+# is added to the PATH, so GNU sed will be used by Linux.  Alternative solution
+# would be to install GNU sed as `sed` in Homebrew, however that might have
+# some negative effect on other applications, so I don't think it is wise to
+# require this from the user.
+if [ "$IS_MAC_OS" = yes ]; then
+    mkdir $build_dir/macos_aliases
+    ln -s $(which gsed) $build_dir/macos_aliases/sed
+    export PATH=$build_dir/macos_aliases:$PATH
+fi
+
 # -----------------------------------------------------------------------------
 # Install the Linux headers