From 1cca6143f530f261227f65b0ddbc1255a810f950 Mon Sep 17 00:00:00 2001
From: Simon Howard <fraggle@soulsphere.org>
Date: Sun, 20 Jan 2019 16:04:32 -0500
Subject: [PATCH] Add new module to check if a library is installed.

This is very suboptimal compared to using pkg-config, but there are
still some libraries which don't install pkg-config files.
---
 chocpkg/modules.sh               |  4 ++++
 chocpkg/modules/check_library.sh | 14 ++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 chocpkg/modules/check_library.sh

diff --git a/chocpkg/modules.sh b/chocpkg/modules.sh
index acb0ad5..1283c05 100644
--- a/chocpkg/modules.sh
+++ b/chocpkg/modules.sh
@@ -21,6 +21,10 @@ check_pkgconfig() {
     install_module check_pkgconfig "$@"
 }
 
+check_library() {
+    install_module check_library "$@"
+}
+
 check_tool() {
     install_module check_tool "$@"
 }
diff --git a/chocpkg/modules/check_library.sh b/chocpkg/modules/check_library.sh
new file mode 100644
index 0000000..91b8338
--- /dev/null
+++ b/chocpkg/modules/check_library.sh
@@ -0,0 +1,14 @@
+
+check_library::init() {
+    PACKAGE_INSTALLED_LIB=$1
+}
+
+# Function that returns true if a specified C library is installed.
+do_check() {
+  # TODO: A better way to choose compiler command?
+  ${CC:-gcc} \
+      -l$PACKAGE_INSTALLED_LIB $LDFLAGS \
+      -o/dev/null \
+      -x c <( echo "int main() {}")
+}
+