build: Add a separate configuration step

1 files changed, 64 insertions, 0 deletions

diff --git a/config/pkgconf.sh b/config/pkgconf.sh
new file mode 100755
index 0000000..070fad6
--- /dev/null
+++ b/config/pkgconf.sh
@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+
+# Copyright © Tavian Barnes <tavianator@tavianator.com>
+# SPDX-License-Identifier: 0BSD
+
+# pkg-config wrapper with hardcoded fallbacks
+
+set -eu
+
+MODE=
+if [[ "$1" == --* ]]; then
+    MODE="$1"
+    shift
+fi
+
+if command -v "${PKG_CONFIG:-}" &>/dev/null; then
+    case "$MODE" in
+        --cflags)
+            "$PKG_CONFIG" --cflags "$@"
+            ;;
+        --ldflags)
+            "$PKG_CONFIG" --libs-only-L --libs-only-other "$@"
+            ;;
+        --ldlibs)
+            "$PKG_CONFIG" --libs-only-l "$@"
+            ;;
+        "")
+            "$PKG_CONFIG" "$@"
+            ;;
+    esac
+else
+    for lib; do
+        case "$lib" in
+            libacl)
+                LDLIB=-lacl
+                ;;
+            libcap)
+                LDLIB=-lcap
+                ;;
+            liburing)
+                LDLIB=-luring
+                ;;
+            oniguruma)
+                LDLIB=-lonig
+                ;;
+            *)
+                printf 'error: Unknown package %s\n' "$lib" >&2
+                exit 1
+        esac
+
+        case "$MODE" in
+            --ldlibs)
+                printf ' %s' "$LDLIB"
+                ;;
+            "")
+                config/cc.sh "config/$lib.c" "$LDLIB" || exit $?
+                ;;
+        esac
+    done
+
+    if [ "$MODE" = "--ldlibs" ]; then
+        printf '\n'
+    fi
+fi