NAME_options files: allow values with spaces

Previously these files were split into arguments based on default IFS
(space, tab, newline), which means that they couldn't hold whitespaces.

Now they're split by newlines, so the entire line is a single value.

Like before, values with newline[s] or empty can't be stored at the
file, but other than these the files can now hold arbitrary values.

This is potentially a breaking change, because while it was documented
that there should be one value per line (and the example didn't add
leading/trailing spaces), in practice it was possible to place several
values per line, and leading/trailing spaces were ignored.

So this will break for users who placed several options per line and/or
expect whitespaces to be ignored.

Also, libass and fribidi didn't support *_options files, now they do.

4 files changed, 24 insertions, 0 deletions

diff --git a/scripts/ffmpeg-config b/scripts/ffmpeg-config
index 49d68f1..64ac613 100755
--- a/scripts/ffmpeg-config
+++ b/scripts/ffmpeg-config
@@ -2,9 +2,13 @@
 set -e
 
 BUILD="$(pwd)"
+newline="
+"
 
 if test -f "$BUILD"/ffmpeg_options ; then
+    IFS=$newline
     set -- $(cat "$BUILD"/ffmpeg_options) "$@"
+    unset -v IFS
 fi
 
 OPTIONS="--enable-gpl --disable-debug --disable-doc"
diff --git a/scripts/fribidi-config b/scripts/fribidi-config
index f9e7be6..3855248 100755
--- a/scripts/fribidi-config
+++ b/scripts/fribidi-config
@@ -1,6 +1,14 @@
 #!/bin/sh
 set -e
 BUILD="$(pwd)"
+newline="
+"
+
+if test -f "$BUILD"/fribidi_options ; then
+    IFS=$newline
+    set -- $(cat "$BUILD"/fribidi_options) "$@"
+    unset -v IFS
+fi
 
 OPTIONS=
 if "$BUILD"/scripts/test-libmpv ; then
diff --git a/scripts/libass-config b/scripts/libass-config
index 1a6e56e..82cfe6c 100755
--- a/scripts/libass-config
+++ b/scripts/libass-config
@@ -1,6 +1,14 @@
 #!/bin/sh
 set -e
 BUILD="$(pwd)"
+newline="
+"
+
+if test -f "$BUILD"/libass_options ; then
+    IFS=$newline
+    set -- $(cat "$BUILD"/libass_options) "$@"
+    unset -v IFS
+fi
 
 OPTIONS=
 if "$BUILD"/scripts/test-libmpv ; then
diff --git a/scripts/mpv-config b/scripts/mpv-config
index 126fdcf..c83f22d 100755
--- a/scripts/mpv-config
+++ b/scripts/mpv-config
@@ -2,9 +2,13 @@
 set -e
 
 BUILD="$(pwd)"
+newline="
+"
 
 if test -f "$BUILD"/mpv_options ; then
+    IFS=$newline
     set -- $(cat "$BUILD"/mpv_options) "$@"
+    unset -v IFS
 fi
 
 case "$PKG_CONFIG_PATH" in