build: Move per-file flag support into cc.sh

1 files changed, 21 insertions, 3 deletions

diff --git a/build/cc.sh b/build/cc.sh
index fd58393..e1d2b0b 100755
--- a/build/cc.sh
+++ b/build/cc.sh
@@ -3,14 +3,32 @@
 # Copyright © Tavian Barnes <tavianator@tavianator.com>
 # SPDX-License-Identifier: 0BSD
 
-# Run the compiler and check if it succeeded
+# Run the compiler and check if it succeeded.  Usage:
+#
+#     $ build/cc.sh [-q] path/to/file.c [-flags -Warnings ...]
 
 set -eu
 
+QUIET=
 if [ "$1" = "-q" ]; then
+    QUIET=y
     shift
-else
+fi
+
+# Source files can specify their own flags with lines like
+#
+#     /// _CFLAGS += -Wmissing-variable-declarations
+#
+# which will be added to the makefile on success, or lines like
+#
+#     /// -Werror
+#
+# which are just used for the current file.
+EXTRA_FLAGS=$(sed -n '\|^///|{s|^/// ||; s|[^=]*= ||; p;}' "$1")
+
+# Without -q, print the executed command for config.log
+if [ -z "$QUIET" ]; then
     set -x
 fi
 
-$XCC $XCPPFLAGS $XCFLAGS $XLDFLAGS "$@" $XLDLIBS
+$XCC $XCPPFLAGS $XCFLAGS $XLDFLAGS "$@" $EXTRA_FLAGS $XLDLIBS