1 files changed, 96 insertions, 0 deletions
diff --git a/build/pkgconf.sh b/build/pkgconf.sh
new file mode 100755
index 0000000..decf706
--- /dev/null
+++ b/build/pkgconf.sh
@@ -0,0 +1,96 @@
+#!/bin/sh
+
+# Copyright © Tavian Barnes <tavianator@tavianator.com>
+# SPDX-License-Identifier: 0BSD
+
+# pkg-config wrapper with hardcoded fallbacks
+
+set -eu
+
+MODE=
+case "${1:-}" in
+    --*)
+        MODE="$1"
+        shift
+esac
+
+if [ $# -lt 1 ]; then
+    exit
+fi
+
+case "$XNOLIBS" in
+    y|1)
+        exit 1
+esac
+
+if [ -z "$MODE" ]; then
+    # Check whether the libraries exist at all
+    for LIB; do
+        # Check ${WITH_$LIB}
+        WITH_LIB="WITH_$(printf '%s' "$LIB" | tr 'a-z-' 'A-Z_')"
+        eval "WITH=\"\${$WITH_LIB:-}\""
+        case "$WITH" in
+            y|1) continue ;;
+            n|0) exit 1 ;;
+        esac
+
+        XCFLAGS="$XCFLAGS $("$0" --cflags "$LIB")" || exit 1
+        XLDFLAGS="$XLDFLAGS $("$0" --ldflags "$LIB")" || exit 1
+        XLDLIBS="$("$0" --ldlibs "$LIB") $XLDLIBS" || exit 1
+        build/cc.sh "build/with/$LIB.c" -o "gen/with/.$LIB.out" || exit 1
+    done
+fi
+
+# Defer to pkg-config if possible
+if command -v "${XPKG_CONFIG:-}" >/dev/null 2>&1; then
+    case "$MODE" in
+        --cflags)
+            "$XPKG_CONFIG" --cflags "$@"
+            ;;
+        --ldflags)
+            "$XPKG_CONFIG" --libs-only-L --libs-only-other "$@"
+            ;;
+        --ldlibs)
+            "$XPKG_CONFIG" --libs-only-l "$@"
+            ;;
+    esac
+
+    exit
+fi
+
+# pkg-config unavailable, emulate it ourselves
+CFLAGS=""
+LDFLAGS=""
+LDLIBS=""
+
+for LIB; do
+    case "$LIB" in
+        libacl)
+            LDLIB=-lacl
+            ;;
+        libcap)
+            LDLIB=-lcap
+            ;;
+        libselinux)
+            LDLIB=-lselinux
+            ;;
+        liburing)
+            LDLIB=-luring
+            ;;
+        oniguruma)
+            LDLIB=-lonig
+            ;;
+        *)
+            printf 'error: Unknown package %s\n' "$LIB" >&2
+            exit 1
+            ;;
+    esac
+
+    LDLIBS="$LDLIBS$LDLIB "
+done
+
+case "$MODE" in
+    --ldlibs)
+        printf '%s\n' "$LDLIBS"
+        ;;
+esac