dnl Process this file with autoconf to produce a configure script.
AC_INIT(wipe.c)
AC_CONFIG_HEADER(config.h)

AC_SUBST(src)
AC_SUBST(req)
AC_SUBST(obj)
AC_SUBST(bin)
AC_SUBST(DEBUG)
srcdir="."
src=wipe.c
req="config.h require.h debug.h"
obj=wipe.o
bin=wipe

fullCFLAGS=""
wallCFLAGS=""
pendanticCFLAGS=""
tempCFLAGS=""
temp2CFLAGS=""
checkCFLAGS=""
optCFLAGS=""
#CFLAGS="-g -Wall -Werror -ansi -pedantic -O2 -finline-functions -ffast-math -fomit-frame-pointer"

AC_CANONICAL_SYSTEM

AC_SUBST(OSTYPE)
OSTYPE=`echo $build_os | sed 's/\..*$//g' | sed 's/-.*//g' | tr [[a-z]] [[A-Z]]`

dnl Checks for programs.
AC_PROG_CC
AC_ISC_POSIX
AC_PROG_GCC_TRADITIONAL
AC_PROG_INSTALL

dnl Compilation tests
AC_MSG_CHECKING([whether the C compiler accepts -pipe])
CFLAGS="-pipe"
AC_TRY_COMPILE(,,AC_MSG_RESULT(yes); tempCFLAGS="$CFLAGS",AC_MSG_RESULT(no))

AC_MSG_CHECKING([whether the C compiler accepts -g])
CFLAGS="-g"
AC_TRY_COMPILE(,,AC_MSG_RESULT(yes); debugCFLAGS="$CFLAGS",AC_MSG_RESULT(no))

AC_MSG_CHECKING([whether the C compiler accepts -O0])
CFLAGS="-O0"
AC_TRY_COMPILE(,,AC_MSG_RESULT(yes); debugCFLAGS="$debugCFLAGS $CFLAGS",AC_MSG_RESULT(no))

AC_MSG_CHECKING([whether the C compiler accepts -O2])
CFLAGS="-O2"
AC_TRY_COMPILE(,,AC_MSG_RESULT(yes); tempCFLAGS="$tempCFLAGS $CFLAGS",AC_MSG_RESULT(no))

AC_MSG_CHECKING([whether the C compiler accepts -ansi])
CFLAGS="-ansi"
AC_TRY_COMPILE(,,AC_MSG_RESULT(yes); checkCFLAGS="$checkCFLAGS $CFLAGS",AC_MSG_RESULT(no))

AC_MSG_CHECKING([whether the C compiler accepts -pedantic])
CFLAGS="-pedantic"
AC_TRY_COMPILE(,,AC_MSG_RESULT(yes); checkCFLAGS="$checkCFLAGS $CFLAGS",AC_MSG_RESULT(no))

AC_MSG_CHECKING([whether the C compiler accepts -Wall])
CFLAGS="-Wall"
AC_TRY_COMPILE(,,AC_MSG_RESULT(yes); wallCFLAGS="$CFLAGS",AC_MSG_RESULT(no))

AC_MSG_CHECKING([whether the C compiler accepts -Werror])
CFLAGS="-Werror"
AC_TRY_COMPILE(,,AC_MSG_RESULT(yes); pedanticCFLAGS="$wallCFLAGS $CFLAGS",AC_MSG_RESULT(no))

#AC_MSG_CHECKING([whether the C compiler accepts -ffast-math])
#CFLAGS="-ffast-math"
#AC_TRY_COMPILE(,,AC_MSG_RESULT(yes); optCFLAGS="$optCFLAGS $CFLAGS",AC_MSG_RESULT(no))

AC_ARG_ENABLE(wall,
	[  --enable-wall        compile with -ansi -pedantic -Wall -Werror],
	[with_wall=$enableval],
	[with_wall=no])
test "$with_wall" = "yes" && fullCFLAGS="$checkCFLAGS $wallCFLAGS $pendanticCFLAGS $fullCFLAGS"

temp2CFLAGS="$tempCFLAGS $optCFLAGS"

AC_ARG_ENABLE(debug,
	[  --enable-debug       compile for debugger compatibility],
	[with_debug=$enableval],
	[with_debug=no])
test "$with_debug" = "yes" && temp2CFLAGS="$wallCFLAGS $debugCFLAGS"

AC_ARG_ENABLE(efence,
	[  --enable-efence      debug build + link with electric fence],
	[with_efence=$enableval],
	[with_efence=no])
test "$with_efence" = "yes" && temp2CFLAGS="$debugCFLAGS" && LIBS="-lefence"

DEBUG="$debugCFLAGS $fullCFLAGS"
fullCFLAGS="$temp2CFLAGS $fullCFLAGS -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
CFLAGS="$checkCFLAGS -D__USE_BSD -D_BSD_SOURCE -D__USE_POSIX -D_POSIX_SOURCE -D_POSIX_MAPPED_FILES"

dnl Checks for libraries.

dnl Checks for header files.
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_CHECK_HEADERS(unistd.h stdint.h fcntl.h memory.h linux/fs.h sys/mount.h sys/disklabel.h sys/ioctl.h sys/file.h sys/stat.h sys/time.h sys/types.h getopt.h errno.h termio.h termios.h linux/mtio.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
dnl AC_SYS_LARGEFILE doesn't work, i give up
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_HEADER_STAT

dnl for solaris
dnl AC_CHECK_TYPES(u_int32_t)
dnl AC_CHECK_TYPE(uint32_t, AC_DEFINE(HAVE_UINT32_T, 1), , )

dnl Checks for library functions.
AC_FUNC_MMAP
AC_CHECK_FUNCS(getopt strnlen bzero memset memcpy realloc fchmod ioctl fcntl lockf flock fsync fdatasync unlink rmdir remove rename dirfd)

dnl commented out, it's not defining
dnl to avoid cache, check row the second time
dnl AC_CHECK_MEMBER(struct winsize.ws_col, AC_DEFINE(HAVE_WINSIZE), , #include <sys/ioctl.h>)
dnl AC_CHECK_MEMBER(struct winsize.ws_row, AC_DEFINE(HAVE_WINSIZE), , #include <termio.h>)

dnl Done with tests

CFLAGS="$fullCFLAGS"

AC_OUTPUT(Makefile)