Add scripts to sanity check the shared object for exported and PLT symbols

src/check-def.sh checks that the list of symbols exported is the same as the
list of symbols in cairo.def, ie. symbols in public header files. (except for
symbols starting with _cairo)

src/check-plt.sh checks that no PLT entries exist for local function calls.
This makes sure we keep the 'slim' annotations uptodate.

These two are defined as tests in src/ and will be run during "make distcheck".
However, they are skipped if the commands 'nm' and 'readelf' are not found.
(We don't really rely on any functionality of eu-readelf, so using readelf
proper which should be more commonlly installed.)

1 files changed, 17 insertions, 0 deletions

diff --git a/src/check-plt.sh b/src/check-plt.sh
new file mode 100755
index 000000000..1dd90052a
--- /dev/null
+++ b/src/check-plt.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+LANG=C
+
+status=0
+
+if ! which readelf 2>/dev/null >/dev/null; then
+	echo "'readelf' not found; skipping test"
+	exit 0
+fi
+
+for so in .libs/lib*.so; do
+	echo Checking $so for local PLT entries
+	readelf -r $so | grep 'JU\?MP_SLOT' | grep 'cairo\|pixman' && status=1
+done
+
+exit $status