Refactor build system with GNUmakefile and autotools

- Replace bootstrap script with GNUmakefile for automatic build generation
- Configure libtool with disable-static by default (use --enable-static to enable)
- Fix Makefile.am to remove non-existent Windows source reference
- Remove all prebuilt static libraries from repository
- Add distclean target to remove all generated files

Author: soppelmann

GNUmakefile

@@ -0,0 +1,63 @@
+PREFIX ?= /usr/local
+
+GENERATED_MAKEFILE := $(wildcard Makefile)
+
+.PHONY: distclean
+distclean:
+	@if [ -f Makefile ]; then \
+		echo "Running make distclean..."; \
+		$(MAKE) -f Makefile distclean 2>/dev/null || true; \
+	fi
+	@echo "Removing autotools generated files..."
+	@rm -rf Makefile Makefile.in configure config.* libtool aclocal.m4 stamp-h1 autom4te.cache
+	@rm -rf compile config.guess config.sub depcomp install-sh ltmain.sh missing
+	@rm -rf .libs .deps src/.libs src/.deps
+	@rm -f *.lo *.la src/*.lo src/*.la
+	@echo "All generated files removed. Run 'make' to rebuild."
+
+# If Makefile exists, delegate to it
+ifneq ($(GENERATED_MAKEFILE),)
+
+.DEFAULT_GOAL := all
+
+%:
+	$(MAKE) -f Makefile $@
+
+else
+
+# No Makefile - need to generate build system
+.DEFAULT_GOAL := all
+
+configure: configure.ac Makefile.am
+	@echo "Generating build system..."
+	@which glibtoolize > /dev/null 2>&1 && glibtoolize --copy --force --quiet || libtoolize --copy --force --quiet
+	@aclocal
+	@autoheader
+	@automake --add-missing --copy --foreign
+	@autoconf
+	@echo ""
+
+Makefile: configure
+	@echo "Running configure..."
+	@./configure --prefix=$(PREFIX)
+	@echo ""
+
+.PHONY: all
+all: Makefile
+	@$(MAKE) -f Makefile all
+	@echo ""
+	@echo "Build complete. Install with: make install"
+	@echo ""
+
+.PHONY: build
+build: all
+
+.PHONY: install
+install: Makefile
+	@$(MAKE) -f Makefile install
+
+.PHONY: clean
+clean: Makefile
+	@$(MAKE) -f Makefile clean
+
+endif

Makefile.am

@@ -1,16 +1,8 @@
-pkglib_LTLIBRARIES = libasyncprocess.la
-libasyncprocess_la_LDFLAGS = -module -avoid-version -no-undefined
-libasyncprocess_la_SOURCES = src/async-process.c src/async-process_windows.c
+lib_LTLIBRARIES = libasyncprocess.la
+libasyncprocess_la_LDFLAGS = -version-info 0:0:0 -no-undefined
+libasyncprocess_la_SOURCES = src/async-process.c
 
-copy:
-	$(MKDIR_P) static/`uname -m`/`uname`
-	cp -f .libs/libasyncprocess.so static/`uname -m`/`uname`/libasyncprocess.so|true
-	cp -f .libs/libasyncprocess.dylib static/`uname -m`/`uname`/libasyncprocess.dylib|true
-	case "$(MSYSTEM)" in \
-	  MINGW32)           \
-            $(MKDIR_P) static/x86/windows ;\
-	    cp -f .libs/libasyncprocess.dll static/x86/windows/libasyncprocess.dll|true;; \
-	  *)                 \
-            $(MKDIR_P) static/`uname -m`/windows ;\
-	    cp -f .libs/libasyncprocess.dll static/`uname -m`/windows/libasyncprocess.dll|true;; \
-	esac
+include_HEADERS = src/async-process.h
+
+install-exec-hook:
+	rm -f $(DESTDIR)$(libdir)/libasyncprocess.la

bootstrap

@@ -1,12 +1,35 @@
 AC_INIT([async-process], [0.1])
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS([config.h])
 
-AM_INIT_AUTOMAKE([foreign])
-LT_INIT(shared win32-dll)
+# Set default prefix based on platform if not specified
+AC_PREFIX_DEFAULT([/usr/local])
+
+AM_INIT_AUTOMAKE([foreign subdir-objects])
+
+# Must detect C compiler before initializing libtool
 AC_PROG_CC
 
+# Initialize libtool (disable static by default, enable with --enable-static)
+LT_INIT([disable-static])
+
+# Platform-specific configuration
+AC_CANONICAL_HOST
+case $host_os in
+  freebsd*)
+    # FreeBSD typically uses /usr/local
+    test "$prefix" = NONE && prefix=/usr/local
+    ;;
+  darwin*)
+    # macOS typically uses /usr/local
+    test "$prefix" = NONE && prefix=/usr/local
+    ;;
+  linux*)
+    # Linux typically uses /usr/local for user-installed software
+    test "$prefix" = NONE && prefix=/usr/local
+    ;;
+esac
 
-AC_CHECK_HEADERS([fcntl.h stdlib.h string.h unistd.h windows.h])
+AC_CHECK_HEADERS([fcntl.h stdlib.h string.h unistd.h])
 
 AC_CHECK_HEADER_STDBOOL
 AC_TYPE_PID_T
@@ -17,3 +40,32 @@ AC_CHECK_FUNCS([dup2 strerror])
 
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT
+
+# Print configuration summary
+AC_MSG_NOTICE([
+  async-process configuration summary:
+
+  Installation prefix: $prefix
+  Library directory:   $libdir
+  Include directory:   $includedir
+  C Compiler:          $CC
+  Host system:         $host_os
+  Build shared:        $enable_shared
+  Build static:        $enable_static
+
+  Note: This C library is for Unix-like systems only (Linux, FreeBSD, macOS).
+  Windows support is provided via pure Lisp CFFI implementation and does not
+  require C compilation.
+
+  You can now run 'make' to build the library.
+  After building, run 'make install' to install to the prefix.
+
+  To install to a different location, reconfigure with:
+    ./configure --prefix=/your/custom/path
+
+  To build static library:
+    ./configure --enable-static
+
+  To build only static (no shared):
+    ./configure --enable-static --disable-shared
+])