#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_PREREQ([2.68])
AC_INIT([cfa-cc],[1.0.0],[cforall@plg.uwaterloo.ca])
AC_CONFIG_AUX_DIR([automake])
#AC_CONFIG_SRCDIR([src/main.cc])
AC_CONFIG_HEADERS([config.h])
AM_SILENT_RULES([no])

if test "x${CXXFLAGS}" = "x"; then
   export CXXFLAGS="-std=c++11 -g ${CXXFLAGS}"	# defaults, no -O2 for debugging and failures
else
   export CXXFLAGS="-std=c++11 ${CXXFLAGS}"	# flags from configure command
fi

AM_INIT_AUTOMAKE
AM_MAINTAINER_MODE(enable)			# may require auto* software to be installed

# Installation paths

AC_ARG_WITH(backend-compiler,
	[  --with-backend-compiler=PROGRAM     PROGRAM that performs the final code compilation (must be gcc-compatible) ],
	backendcompiler=$withval, backendcompiler="")
if test "x$backendcompiler" != "x"; then
	BACKEND_CC=${backendcompiler}
else
	AC_PATH_PROG(BACKEND_CC, gcc, [])	# check gcc installed
	if test "x$BACKEND_CC" = "x"; then
		AC_MSG_ERROR(some version of gcc is needed. Get it at ftp://ftp.gnu.org)
		exit 1
	fi
fi
AC_DEFINE_UNQUOTED(CFA_BACKEND_CC, "${BACKEND_CC}", [Location of include files.])
AC_SUBST(CFA_BACKEND_CC)

if test "x$prefix" = "xNONE"; then
	cfa_prefix=${ac_default_prefix}
else
	cfa_prefix=${prefix}
fi
AC_DEFINE_UNQUOTED(CFA_PREFIX, "${cfa_prefix}", [Location of cfa install.])
AC_SUBST(CFA_PREFIX, ${cfa_prefix})

if test "$includedir" = '${prefix}/include'; then
 	cfa_incdir="${cfa_prefix}/include"
else
 	cfa_incdir=${includedir}
fi
AC_DEFINE_UNQUOTED(CFA_INCDIR, "${cfa_incdir}", [Location of include files.])
AC_SUBST(CFA_INCDIR, ${cfa_incdir})

if test "$bindir" = '${exec_prefix}/bin'; then
 	cfa_bindir="${cfa_prefix}/bin"
else
 	cfa_bindir=${bindir}
fi
AC_DEFINE_UNQUOTED(CFA_BINDIR, "${cfa_bindir}", [Location of cfa command.])
AC_SUBST(CFA_BINDIR, ${cfa_bindir})

if test "$libdir" = '${exec_prefix}/lib'; then
 	cfa_libdir=${cfa_prefix}/lib
else
 	cfa_libdir=${libdir}
fi
AC_DEFINE_UNQUOTED(CFA_LIBDIR, "${cfa_libdir}", [Location of cc1 and cfa-cpp commands.])
AC_SUBST(CFA_LIBDIR, ${cfa_libdir})

AC_DEFINE_UNQUOTED(CFA_FLAGS, "${CFAFLAGS}", [compilation flags for cfa libraries and test programs.])
AC_SUBST(CFA_FLAGS, ${CFAFLAGS})

# Checks for programs.
AC_PROG_CXX
AC_PROG_CC
AM_PROG_CC_C_O	# deprecated
# These are often not installed and people miss seeing the "no", so stop the configure.
AC_PROG_YACC
if test "${YACC}" = "yacc" ; then echo "Error: bison required." ; exit 1 ; fi
AC_PROG_LEX
if test "${LEX}" = "lex" ; then echo "Error: flex required." ; exit 1 ; fi
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_RANLIB

# Checks for libraries.

# Checks for header files.
AC_FUNC_ALLOCA
AC_CHECK_HEADERS([fenv.h float.h inttypes.h libintl.h limits.h malloc.h stddef.h stdlib.h string.h unistd.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_HEADER_STDBOOL
AC_C_INLINE
AC_TYPE_INT16_T
AC_TYPE_INT32_T
AC_TYPE_INT8_T
AC_C_RESTRICT
AC_TYPE_SIZE_T
AC_TYPE_UINT16_T
AC_TYPE_UINT32_T
AC_TYPE_UINT8_T

# Checks for library functions.
AC_CHECK_FUNCS([memset putenv strchr strtol])

AC_CONFIG_FILES([
	Makefile
	src/driver/Makefile
	src/Makefile
	src/examples/Makefile
	src/tests/Makefile
	src/libcfa/Makefile
	])

AC_OUTPUT

# Final text
AC_MSG_RESULT(Cforall configuraton completed. Type "make -j 8 install".)