1 files changed, 137 insertions, 0 deletions
diff --git a/configure b/configure
new file mode 100755
index 0000000..0608b83
--- /dev/null
+++ b/configure
@@ -0,0 +1,137 @@
+#!/usr/bin/env sh
+#
+# Configure script for impl
+#
+
+CONFIGURE_CMD_ARGS="${*}"
+
+PACKAGE_VERSION="0.1.0"
+PACKAGE_DATE="$(date +%Y-%m-%d)"
+PACKAGE_STRING="impl $PACKAGE_VERSION"
+PACKAGE_BUGREPORT="ethan@gweithio.com"
+PACKAGE_URL="https://sixfourtwelve.com/repos/impl.git"
+
+find_program() {
+	varname=$1
+	shift
+
+	printf "Checking for $varname ..." >&2
+	for x in $*; do
+		if command -v $x >/dev/null 2>&1 && [ -x $(command -v $x) ]; then
+			binary="$(command -v $x)"
+			printf " $binary\n" >&2
+			echo "${binary}"
+			return 0
+		fi
+	done
+	printf " not found\n" >&2
+	return 1
+}
+
+die() {
+	printf "%s\n" "${*}"
+	exit 1
+}
+
+# Default values
+PREFIX="/usr/local"
+OPTIMISE="release"
+CC=""
+AR="ar"
+RANLIB="ranlib"
+RM="rm"
+INSTALL="install"
+
+# Parse arguments
+while [ $# -gt 0 ]; do
+	case "$1" in
+		--prefix=*)
+			PREFIX="${1#--prefix=}"
+			;;
+		--prefix)
+			shift
+			PREFIX="$1"
+			;;
+		--debug)
+			OPTIMISE="debug"
+			;;
+		--release)
+			OPTIMISE="release"
+			;;
+		--help)
+			cat <<EOF
+Configure script for impl
+
+Options:
+  --prefix=PREFIX        Installation prefix (default: /usr/local)
+  --debug                Build with debug symbols, no optimization
+  --release              Build with optimizations (default)
+  --help                 Show this help message
+
+Environment variables:
+  CC                     C compiler
+  AR                     Archiver
+  RANLIB                 ranlib
+  CFLAGS                 Additional C flags
+  LDFLAGS                Additional linker flags
+EOF
+			exit 0
+			;;
+		*)
+			die "Unknown option: $1"
+			;;
+	esac
+	shift
+done
+
+# Find required tools
+if [ -z "$CC" ]; then
+	CC=$(find_program CC cc clang gcc) || die "No C compiler found"
+fi
+
+# Use basename only for better tool compatibility (e.g., bear)
+CC=$(basename "$CC")
+
+# Detect compiler type
+if $CC --version 2>&1 | grep -i clang >/dev/null; then
+	CCOM="clang"
+elif $CC --version 2>&1 | grep -i gcc >/dev/null; then
+	CCOM="gcc"
+else
+	CCOM="unknown"
+fi
+
+printf "Compiler: %s (%s)\n" "$CC" "$CCOM"
+
+# Generate config.h
+cat > config.h <<EOF_CONFIG
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define PACKAGE_VERSION "$PACKAGE_VERSION"
+#define PACKAGE_STRING "$PACKAGE_STRING"
+#define PACKAGE_BUGREPORT "$PACKAGE_BUGREPORT"
+#define PACKAGE_URL "$PACKAGE_URL"
+
+#endif /* CONFIG_H */
+EOF_CONFIG
+
+# Determine source directory
+SRCDIR="$(dirname "$0")"
+SRCDIR="$(cd "$SRCDIR" && pwd)"
+
+# Generate Makefile from Makefile.in
+sed \
+	-e "s|@PREFIX@|$PREFIX|g" \
+	-e "s|@CC@|$CC|g" \
+	-e "s|@CCOM@|$CCOM|g" \
+	-e "s|@AR@|$AR|g" \
+	-e "s|@RANLIB@|$RANLIB|g" \
+	-e "s|@RM@|$RM|g" \
+	-e "s|@INSTALL@|$INSTALL|g" \
+	-e "s|@OPTIMISE@|$OPTIMISE|g" \
+	-e "s|@VERSION@|$PACKAGE_VERSION|g" \
+	-e "s|@SRCDIR@|$SRCDIR|g" \
+	< "$SRCDIR/Makefile.in" > Makefile
+
+echo "Configuration complete. Run 'make' to build."