configure.ac

# To compile on UNIX systems:
# aclocal
# autoconf
# ./configure
# make

AC_PREREQ([2.69])
AC_INIT([calibrator], [0.0.15], [BUG-REPORT-ADDRESS])

# Checks for programs.
AC_PROG_CC(mpicc, egcc, gcc, clang)
AC_MSG_NOTICE([Compiler: $CC])
AC_PROG_MAKE_SET
AC_LANG([C])
PKG_PROG_PKG_CONFIG

# Checks for libraries.
AC_SEARCH_LIBS([sqrt], [m])
PKG_CHECK_MODULES([GSL], [gsl])
PKG_CHECK_MODULES([XML], [libxml-2.0])
PKG_CHECK_MODULES([GTHREAD], [gthread-2.0])
PKG_CHECK_MODULES([GLIB], [glib-2.0])

# Checks for header files.
AC_CHECK_HEADERS([stdlib.h string.h unistd.h])

# Checking MPI
if test $CC == "mpicc"; then
	AC_SUBST(MPIDEFINE, "-DHAVE_MPI")
	AC_MSG_NOTICE([Found MPI compiler])
fi

# Checking -march=native compiler flag
compiler=$CC
CC="$CC -march=native"
AC_TRY_LINK([],
	[int main(int argc, char **argv){return 0;}], [arch=1], [arch=0])
CC=$compiler
if test $arch == 0; then
	AC_MSG_NOTICE([checking for -march=native... no])
	AC_SUBST(ARCH, "")
else
	AC_MSG_NOTICE([checking for -march=native... yes])
	AC_SUBST(ARCH, "-march=native")
fi

# Checking -flto compiler flag
compiler=$CC
CC="$CC -flto"
AC_TRY_LINK([], [int main(int argc, char **argv){return 0;}], [lto=1], [lto=0])
CC=$compiler
if test $lto == 0; then
	AC_MSG_NOTICE([checking for -flto... no])
	AC_SUBST(LTO, "")
else
	AC_MSG_NOTICE([checking for -flto... yes])
	AC_SUBST(LTO, "-flto")
fi

# Checks for library functions.
AC_FUNC_MALLOC
AC_FUNC_REALLOC
AC_CHECK_FUNCS([strtoul])

# Final output
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([Makefile])
AC_OUTPUT