Script for cross-compiling jq binaries for other platforms.

Makefile.am

@@ -22,7 +22,7 @@ AM_CFLAGS = -Wextra -Wall -Wno-missing-field-initializers	\
 # header file creation so we'll use good old make
 BUILT_SOURCES = lexer.h lexer.c parser.h parser.c
 lexer.c: lexer.l
-	flex -o lexer.c --header-file=lexer.h lexer.l
+	flex -o lexer.c --header-file=lexer.h $<
 lexer.h: lexer.c
 
 # Tell YACC (bison) autoconf macros that you want a header file created.
@@ -54,6 +54,10 @@ docs/site.yml: configure.ac
 	sed 's/^jq_version: .*/jq_version: $(VERSION)/' $@ > $@.new
 	mv $@.new $@
 
+install-binaries: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) install-exec
+
+
 # setup is only used by distribution developers, not package developers.
 # Still, as a matter of allowing patching, its not a bad idea to distribute 
 # the developer setup script in the tarball.

Makefile.in

@@ -1090,7 +1090,7 @@ uninstall-man: uninstall-man1
 	uninstall-man1
 
 lexer.c: lexer.l
-	flex -o lexer.c --header-file=lexer.h lexer.l
+	flex -o lexer.c --header-file=lexer.h $<
 lexer.h: lexer.c
 
 ### Building the jq binary
@@ -1103,6 +1103,9 @@ docs/site.yml: configure.ac
 	sed 's/^jq_version: .*/jq_version: $(VERSION)/' $@ > $@.new
 	mv $@.new $@
 
+install-binaries: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) install-exec
+
 jq.1 :
 	cd ${abs_srcdir}/docs; rake manpage > ${abs_builddir}/$@
 

build/compile

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+# This script is used to cross-compile binaries for 
+# platforms other than the current one
+
+# Usage: $0 <platformname> <configure options>
+# <platformname> is arbitrary, it is the name
+# of the directory which will be created to contain
+# the output binaries.
+
+# e.g. $0 win32 --host=i686-w64-mingw32
+
+set -e
+cd `dirname "$0"`
+
+plat="$1"
+[ -z "$plat" ] && exit 1
+shift
+
+[ -d "$plat" ] || mkdir "$plat"
+rm -rf "$plat/tmp"
+mkdir "$plat/tmp"
+cd "$plat/tmp"
+mkdir install_other
+../../../configure \
+    --prefix="`pwd`/install_other" \
+    --bindir="`pwd`/.." \
+    "$@"
+make install-binaries
+cd ..
+rm -rf tmp