oasis

commit: 96bcd25021135928929e629fb9d3a86571e11e26
parent 171fc7752185f5a24293d995966999f06d23448b
Author: Michael Forney <mforney@mforney.org>
Date:   Tue, 16 Oct 2018 20:01:52 -0700

Add mechanism to probe for size of type

Diffstat:
M
rules.ninja
3
+++
A
scripts/probe-size.sh
13
+++++++++++++

2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/rules.ninja b/rules.ninja
@@ -42,6 +42,9 @@ rule muse
 rule probe
   command = sh ./scripts/probe.sh $var $cc $cflags $ldflags -o /dev/null -x c $in >$out.tmp && mv $out.tmp $out
 
+rule probesize
+  command = sh ./scripts/probe-size.sh $var $cc $cflags -c -o /dev/null -x c $in >$out.tmp && mv $out.tmp $out
+
 # misc tools
 rule touch
   command = touch $out
diff --git a/scripts/probe-size.sh b/scripts/probe-size.sh
@@ -0,0 +1,13 @@
+set -e
+
+var=$1
+shift
+for size in 8 4 2 1 ; do
+	if "$@" -D "$var=$size" 2>/dev/null ; then
+		echo "#define $var $size"
+		exit 0
+	fi
+done
+
+printf "%s: could not determine %s\n" "$0" "$var" >&2
+exit 1