dnl Process this file with autoconf 2.61 or later to produce
dnl a configure script.
AC_PREREQ(2.63)
AC_INIT(config.h.in)
AC_CONFIG_HEADERS(config.h)

dnl Check for broken VPATH handling on older NetBSD makes.
AC_DEFUN(AC_PROG_MAKE_VPATHOK,
[AC_MSG_CHECKING(whether ${MAKE-make} has sane VPATH handling)
set dummy ${MAKE-make}; ac_make=`echo "[$]2" | sed 'y%./+-%__p_%'`
AC_CACHE_VAL(ac_cv_prog_make_vpathok,
[mkdir conftestdir
cat > conftestdir/conftestmake <<\EOF
VPATH = ..
conftestfoo: conftestbar
	@echo ac_make2temp=ok
conftestbar: conftestbaz
	@echo ac_maketemp=broken
	@touch conftestbar
EOF
echo > conftestbaz # these two lines need to be...
echo > conftestbar # ... in this order not the other
changequote(, )dnl
unset ac_maketemp
unset ac_make2temp
# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
eval `cd conftestdir; ${MAKE-make} -f conftestmake 2>/dev/null | grep temp=`
changequote([, ])dnl
if test -n "$ac_maketemp"; then
  ac_cv_prog_make_vpathok=no
else
  if test -n "$ac_make2temp"; then
    ac_cv_prog_make_vpathok=yes
  else
    ac_cv_prog_make_vpathok=no
  fi
fi
rm -rf conftestdir
rm -f conftestbar conftestbaz])dnl
if test $ac_cv_prog_make_vpathok = yes; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
])

AC_PREFIX_PROGRAM(nasm)

dnl Checks for programs.
dnl Consider AC_USE_SYSTEM_EXTENSIONS if autoconf 2.61 is OK in the future
AC_USE_SYSTEM_EXTENSIONS
AC_SYS_LARGEFILE
AC_PROG_CC
AC_PROG_LN_S
AC_PROG_MAKE_SET
if test -f nasm.c; then
  # we're building in the source dir, so we don't need this check at all
  ac_cv_prog_make_vpathok=yes
else
  AC_PROG_MAKE_VPATHOK
fi
AC_PROG_INSTALL

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_C_RESTRICT
AC_TYPE_SIZE_T
PA_WORKING_BOOL
AC_C_BIGENDIAN(AC_DEFINE(WORDS_BIGENDIAN),AC_DEFINE(WORDS_LITTLEENDIAN),,)
AH_TEMPLATE(WORDS_BIGENDIAN,
[Define to 1 if your processor stores words with the most significant
byte first (like Motorola and SPARC, unlike Intel and VAX).])
AH_TEMPLATE(WORDS_LITTLEENDIAN,
[Define to 1 if your processor stores words with the least significant
byte first (like Intel and VAX, unlike Motorola and SPARC).])

dnl If we have gcc, add appropriate options
PA_ADD_CFLAGS([-W])
PA_ADD_CFLAGS([-Wall])
PA_ADD_CFLAGS([-std=c99])
PA_ADD_CFLAGS([-fwrapv])

dnl Look for programs...
AC_CHECK_PROGS(NROFF,    nroff,    false)
AC_CHECK_PROGS(ASCIIDOC, asciidoc, false)
AC_CHECK_PROGS(XMLTO,    xmlto,    false)
AC_CHECK_PROGS(ACRODIST, acrodist, false)
AC_CHECK_PROGS(PS2PDF,   ps2pdf,   false)
AC_CHECK_PROGS(PSTOPDF,  pstopdf,  false)

dnl Check for progs needed for manpage generation
if test $ASCIIDOC = false; then
  AC_MSG_WARN([No acsciidoc package found])
fi
if test $XMLTO = false; then
  AC_MSG_WARN([No xmlto package found])
fi

dnl Checks for header files.
AC_HEADER_STDC
if test $ac_cv_header_stdc = no; then
  AC_MSG_ERROR([NASM requires ANSI C header files to compile])
fi

AC_CHECK_HEADERS(limits.h)
if test $ac_cv_header_limits_h = no; then
  AC_MSG_ERROR([NASM requires '<limits.h>' to compile])
fi

dnl Check for <inttypes.h> or add a substitute version
AC_CHECK_HEADERS(inttypes.h, , CFLAGS="$CFLAGS -I\$(top_srcdir)/inttypes")

dnl The standard header for str*casecmp is <strings.h>
AC_CHECK_HEADERS(strings.h)

dnl Look for <stdbool.h>
AC_CHECK_HEADERS(stdbool.h)

dnl Look for <unistd.h>
AC_CHECK_HEADERS(unistd.h)

dnl Look for <sys/param.h>
AC_CHECK_HEADERS(sys/param.h)

dnl Checks for library functions.
AC_SUBST(XOBJS)

AC_CHECK_FUNCS(strcspn, ,
  AC_MSG_ERROR([NASM requires ANSI C (specifically, "strcspn")]))

AC_CHECK_FUNCS(strspn, ,
  AC_MSG_ERROR([NASM requires ANSI C (specifically, "strspn")]))

missing=true
AC_CHECK_FUNCS([vsnprintf _vsnprintf], missing=false)
if $missing; then
   XOBJS="$XOBJS lib/vsnprintf.o"
fi

missing=true
AC_CHECK_FUNCS([snprintf _snprintf], missing=false)
if $missing; then
   XOBJS="$XOBJS lib/snprintf.o"
fi

AC_CHECK_FUNCS(strcasecmp stricmp)
AC_CHECK_FUNCS(strncasecmp strnicmp)
AC_CHECK_FUNCS(strsep)
AC_CHECK_FUNCS(strlcpy)

AC_CHECK_FUNCS(getuid)
AC_CHECK_FUNCS(getgid)

AC_CHECK_FUNCS(realpath)
AC_CHECK_FUNCS(canonicalize_file_name)
AC_CHECK_FUNCS(_fullpath)
AC_CHECK_FUNCS(pathconf)

dnl Check for functions that might not be declared in the headers for
dnl various idiotic reasons (mostly because of library authors
dnl abusing the meaning of __STRICT_ANSI__)
AC_CHECK_DECLS(strcasecmp)
AC_CHECK_DECLS(stricmp)
AC_CHECK_DECLS(strncasecmp)
AC_CHECK_DECLS(strnicmp)
AC_CHECK_DECLS(strsep)
AC_CHECK_DECLS(strlcpy)

if test $ac_cv_prog_make_vpathok = no; then
  echo Copying generated srcs into build directory to compensate for VPATH breakage
  for file in macros.c insnsa.c insnsd.c insnsn.c insnsi.h version.h version.mac; do
    if test ! -f $file; then cp -p ${srcdir}/${file} .; fi
  done
fi

dnl
dnl support cchace
dnl
AC_ARG_ENABLE([ccache],
[AC_HELP_STRING([--with-ccache], [compile with ccache])],
[CC="ccache $CC"],
[])

PA_ADD_CFLAGS([-pedantic])
dnl LLVM doesn't error out on invalid -W options unless this option is
dnl specified first.  Enable this so this script can actually discover
dnl which -W options are possible for this compiler.
PA_ADD_CFLAGS([-Werror=unknown-warning-option])
dnl Suppress format warning on Windows targets due to their <inttypes.h>
PA_ADD_CFLAGS([-Wpedantic-ms-format],[-Wno-pedantic-ms-format])
PA_ADD_CFLAGS([-Wc90-c99-compat])
PA_ADD_CFLAGS([-Wlong-long],[-Wno-long-long])
AC_ARG_ENABLE([werror],
[AC_HELP_STRING([--enable-werror],
[compile with -Werror to error out on any warning])],
[], [enable_werror=no])
AS_IF([test x"$enable_werror" != xno],
[PA_ADD_CFLAGS([-Werror])],
[PA_ADD_CFLAGS([-Werror=implicit])
PA_ADD_CFLAGS([-Werror=missing-braces])
PA_ADD_CFLAGS([-Werror=return-type])
PA_ADD_CFLAGS([-Werror=trigraphs])
PA_ADD_CFLAGS([-Werror=pointer-arith])
PA_ADD_CFLAGS([-Werror=strict-prototypes])
PA_ADD_CFLAGS([-Werror=missing-prototypes])
PA_ADD_CFLAGS([-Werror=missing-declarations])
PA_ADD_CFLAGS([-Werror=comment])
PA_ADD_CFLAGS([-Werror=vla])])

AC_OUTPUT_COMMANDS([mkdir -p lib nsis output])
AC_OUTPUT(Makefile rdoff/Makefile doc/Makefile)
