dnl Process this file with autoconf 2.69 or later to produce

dnl a configure script.

AC_PREREQ(2.69)

AC_INIT([config/config.h.in])

AC_CONFIG_HEADERS([config/config.h])

AC_PREFIX_PROGRAM(nasm)

AC_CONFIG_AUX_DIR(autoconf/helpers)

dnl Mark where in config.h.in macros auto-generated by the configuration

dnl start; this is used to generate config/unconfig.h.

AH_BOTTOM([

/* Begin unconfig.h */])

dnl Save initial CFLAGS, to see if -g -O2 came from configure or not

pa_init_cflags="$CFLAGS"

dnl This prevents us from running Wine and thinking we are not

dnl cross-compiling when in fact we are; running Wine here is at

dnl the best very slow and doesn't buy us a single thing at all.

WINELOADER=/dev/null

export WINELOADER

dnl Get the canonical target system name

AC_CANONICAL_HOST

dnl Enable any available C extensions

AC_USE_SYSTEM_EXTENSIONS

AC_SYS_LARGEFILE

AC_PROG_CC

AC_PROG_CC_STDC

PA_ADD_CFLAGS([-std=c17], [], [],

[PA_ADD_CFLAGS([-std=c11], [], [],

 [PA_ADD_CFLAGS([-std=c99])])])

dnl If the user did not specify a CFLAGS default, change default

dnl to -O0 for debugging

PA_ARG_DISABLED([optimization],

 [compile without optimization (-O0) to help debugging],

 [pa_no_optimize=true])

dnl Other programs

pa_no_optimize=false

dnl Compile and link with dwarf debug

PA_ARG_ENABLED([gdb],

 [disable optimization and compile with extra debug information for GDB debugger],

 [PA_ADD_CFLAGS([-ggdb3])

  pa_no_optimize=true])

AS_IF([$pa_no_optimize],

      [PA_ADD_CFLAGS([-O0])

       PA_ADD_CFLAGS([-fno-omit-frame-pointer])])

dnl Profiling

PA_ARG_ENABLED([profiling],

 [compile with profiling (-pg option)],

 [PA_ADD_CFLAGS([-pg])])

dnl Abort on panic

PA_ARG_ENABLED([panic-abort],

 [call abort() on panic to trap in the debugger],

 [AC_DEFINE(ABORT_ON_PANIC)])

AH_TEMPLATE(ABORT_ON_PANIC,

[Define to 1 to call abort() on panics (internal errors), for debugging.])

dnl Checks for typedefs, structures, and compiler characteristics.

AC_TYPE_SIZE_T

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 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 Force gcc and gcc-compatible compilers treat signed integers

dnl as 2's complement

PA_ADD_CFLAGS([-fwrapv])

dnl Force clang to behave in a predictable manner, in order to make bugs

dnl possible to track down. gcc appears to have this behavior by default.

PA_ADD_CFLAGS([-ftrivial-auto-var-init=zero])

dnl Some environments abuse __STRICT_ANSI__ to disable some

dnl function declarations

PA_ADD_CFLAGS([-U__STRICT_ANSI__])

dnl Don't put things in common if we can avoid it.  We don't want to

dnl assume all compilers support common, and this will help find those

dnl problems.  This also works around an OSX linker problem.

PA_ADD_CFLAGS([-fno-common])

dnl Check for library extension

PA_LIBEXT

dnl Look for programs...

AC_PROG_LN_S

AC_PROG_MAKE_SET

AC_PROG_INSTALL

AC_PROG_MKDIR_P

AC_CHECK_PROGS(NROFF,    nroff,    false)

AC_CHECK_PROGS(ASCIIDOC, asciidoc, false)

AC_CHECK_PROGS(XMLTO,    xmlto,    false)

AC_CHECK_PROGS(XZ,       xz,       false)

dnl Check for progs needed for manpage generation

MANPAGES=manpages

AS_IF([test x$ASCIIDOC = xfalse],

  [AC_MSG_WARN([No asciidoc package found, cannot build man pages])

   MANPAGES='']

)

AS_IF([test x"$XMLTO" = xfalse],

  [AC_MSG_WARN([No xmlto package found, cannot build man pages])

   MANPAGES='']

)

AC_SUBST([MANPAGES])

dnl Don't create .pdf.xz if there is no xz

AS_IF([test x"$XZ" = xfalse],

  [],

  [XZFILES=xzfiles])

AC_SUBST([XZFILES])

dnl Can't create NSIS package if there is no makensis

dnl ... but it only applies to a Windows target ...

dnl Note: AC_CHECK_TOOLS is supposed to check for the "plain"

dnl version of the program name, but it doesn't seem to.

AC_ARG_WITH([nsis],

[AS_HELP_STRING([[--with-nsis[=makensis]]],

 [build an install .exe using NSIS on Windows hosts])],

 [], [with_nsis=yes])

AS_IF([test x"$MAKENSIS" = x], [],

      [AS_IF([test x"$with_nsis" = xno], []

             [with_nsis="$MAKENSIS"])])

MAKENSIS=false

AS_CASE([$host],

	[*-win* | *-mingw*],

	[AS_IF([test x"$with_nsis" = xno], [],

	 [NSIS=nsis

	  AS_IF([test x"$with_nsis" = xyes],

	  [AC_CHECK_TOOL(MAKENSIS_TOOL, makensis, false)

	   MAKENSIS="$MAKENSIS_TOOL"

	   AS_IF([test x"$MAKENSIS" = xfalse],

	       [AC_CHECK_PROGS(MAKENSIS_PLAIN, makensis, false)

	         MAKENSIS="$MAKENSIS_PLAIN"])

	   AS_IF([test x"$MAKENSIS" = xfalse],

	         [AC_MSG_WARN([no makensis found, cannot build installer])

	          NSIS=''])],

	  [MAKENSIS="$with_nsis"])])])

AC_SUBST([MAKENSIS])

AC_SUBST([NSIS])

dnl Check for host compiler tools

AC_CHECK_TOOL(AR, ar)

AC_CHECK_TOOL(RANLIB, ranlib, :)

AC_CHECK_TOOL(STRIP, strip)

dnl

dnl NOTE: the tests for header files and library functions use constructs

dnl that create warnings on modern compilers, due to lack of prototypes,

dnl etc. Therefore, do not add the -Werror options before this.

dnl

dnl Tests which may trigger warnings on some compilers

AC_C_CONST

AC_C_INLINE

AC_C_RESTRICT

dnl Checks for header files.

AC_HEADER_STDC

PA_ADD_HEADERS(string.h)

PA_ADD_HEADERS(stdarg.h)

AC_CHECK_HEADERS(inttypes.h)

AC_CHECK_HEADERS(strings.h)

AC_HEADER_STDBOOL

AC_CHECK_HEADERS(stdnoreturn.h)

AC_CHECK_HEADERS(io.h)

AC_CHECK_HEADERS(fcntl.h)

AC_CHECK_HEADERS(unistd.h)

AC_CHECK_HEADERS(sys/mman.h)

AC_CHECK_HEADERS(sys/types.h)

AC_CHECK_HEADERS(sys/stat.h)

AC_CHECK_HEADERS(sys/resource.h)

dnl Checks for library functions.

AC_CHECK_FUNCS(strcasecmp stricmp)

AC_CHECK_FUNCS(strncasecmp strnicmp)

AC_CHECK_FUNCS(strsep)

AC_CHECK_FUNCS(strnlen)

AC_CHECK_FUNCS(strrchrnul)

AC_CHECK_FUNCS(iscntrl)

AC_CHECK_FUNCS(isascii)

AC_CHECK_FUNCS(mempcpy)

AC_CHECK_FUNCS(getuid)

AC_CHECK_FUNCS(getgid)

AC_CHECK_FUNCS(getrlimit)

AC_CHECK_FUNCS(realpath)

AC_CHECK_FUNCS(canonicalize_file_name)

AC_CHECK_FUNCS(_fullpath)

AC_CHECK_FUNCS(pathconf)

AC_FUNC_FSEEKO

AC_CHECK_FUNCS([_fseeki64])

AC_CHECK_FUNCS([ftruncate _chsize _chsize_s])

AC_CHECK_FUNCS([fileno _fileno])

AC_FUNC_MMAP

AC_CHECK_FUNCS(getpagesize)

AC_CHECK_FUNCS(sysconf)

AC_CHECK_FUNCS([access _access faccessat])

PA_HAVE_FUNC(__builtin_expect, (1,1))

dnl ilog2() building blocks

PA_ADD_HEADERS(intrin.h)

PA_HAVE_FUNC(__builtin_clz, (0U))

PA_HAVE_FUNC(__builtin_clzl, (0UL))

PA_HAVE_FUNC(__builtin_clzll, (0ULL))

PA_HAVE_FUNC(_BitScanReverse, (0))

PA_HAVE_FUNC(_BitScanReverse64, (0))

PA_FUNC_SNPRINTF

PA_FUNC_VSNPRINTF

AC_CHECK_FUNCS([strlcpy])

AC_CHECK_FUNCS([strrchrnul])

dnl These types are POSIX-specific, and Windows does it differently...

AC_CHECK_TYPES([struct _stati64])

AC_CHECK_TYPES([struct stat])

AC_CHECK_FUNCS([stat _stati64])

AC_CHECK_FUNCS([fstat _fstati64])

AC_CHECK_FUNCS([S_ISREG])

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)

AC_CHECK_DECLS(strnlen)

AC_CHECK_DECLS(strrchrnul)

dnl Check for missing types

AC_TYPE_UINTPTR_T

dnl Documentation: should we generate an uncompressed PDF?  It is

dnl about twice as big, but it can be externally compressed (e.g. with xz)

dnl and becomes significantly smaller than the original.

PA_ARG_DISABLED([pdf-compression],

  [generate an uncompressed documentation PDF],

  [PDFOPT='-nocompress'])

AC_SUBST([PDFOPT])

dnl

dnl Look for byte-swapping support...

dnl

PA_ADD_HEADERS(endian.h sys/endian.h machine/endian.h)

PA_HAVE_FUNC(cpu_to_le16, (0))

PA_HAVE_FUNC(cpu_to_le32, (0))

PA_HAVE_FUNC(cpu_to_le64, (0))

PA_HAVE_FUNC(__cpu_to_le16, (0))

PA_HAVE_FUNC(__cpu_to_le32, (0))

PA_HAVE_FUNC(__cpu_to_le64, (0))

PA_HAVE_FUNC(htole16, (0))

PA_HAVE_FUNC(htole32, (0))

PA_HAVE_FUNC(htole64, (0))

PA_HAVE_FUNC(__bswap_16, (0))

PA_HAVE_FUNC(__bswap_32, (0))

PA_HAVE_FUNC(__bswap_64, (0))

PA_HAVE_FUNC(__builtin_bswap16, (0))

PA_HAVE_FUNC(__builtin_bswap32, (0))

PA_HAVE_FUNC(__builtin_bswap64, (0))

PA_HAVE_FUNC(_byteswap_ushort, (0))

PA_HAVE_FUNC(_byteswap_ulong, (0))

PA_HAVE_FUNC(_byteswap_uint64, (0))

dnl

dnl Some rather useful gcc extensions...

dnl

PA_HAVE_FUNC(__builtin_constant_p, (0))

PA_HAVE_FUNC(__builtin_choose_expr, (0,1,2))

dnl

dnl Check for supported gcc attributes; some compilers (e.g. Sun CC)

dnl support these, but don't define __GNUC__ as they don't support

dnl some other features of gcc.

dnl

PA_ADD_CFLAGS([-Werror=attributes])

PA_FUNC_ATTRIBUTE(noreturn)

PA_FUNC_ATTRIBUTE(returns_nonnull,,,,,never_null)

PA_FUNC_ATTRIBUTE(malloc)

PA_FUNC_ATTRIBUTE(alloc_size,[1])

PA_FUNC_ATTRIBUTE(alloc_size,[1,2])

PA_FUNC_ATTRIBUTE(sentinel,,, [const char *, ...], ["a","b",NULL],end_with_null)

PA_FUNC_ATTRIBUTE(format, [printf,1,2], int, [const char *, ...], ["%d",1])

PA_FUNC_ATTRIBUTE(const)

PA_FUNC_ATTRIBUTE(pure)

PA_FUNC_ATTRIBUTE(cold,,,,,unlikely_func)

PA_FUNC_ATTRIBUTE(unused)

PA_FUNC_ATTRIBUTE_ERROR

dnl

dnl support function sections (if available)

dnl

PA_ARG_DISABLED([sections],

 [do not try to compile with function/data section support],

 [],

 [PA_ADD_CFLAGS([-ffunction-sections])

  PA_ADD_CFLAGS([-fdata-sections])

  PA_ADD_LDFLAGS([-Wl,--gc-sections])]

 )

dnl

dnl support LTO

dnl

PA_ARG_ENABLED([lto],

 [compile with gcc-style link time optimization],

 [PA_ADD_CFLAGS([-flto])

  dnl Note: we use _PROG rather than _TOOL since we are prepending the full

  dnl CC name which ought to already contain the host triplet if needed

  ccbase=`echo "$CC" | awk '{ print $1; }'`

  AC_CHECK_PROGS(CC_AR, [${ccbase}-ar], [$ac_cv_prog_AR])

  AR="$CC_AR"

  AC_CHECK_PROGS(CC_RANLIB, [${ccbase}-ranlib], [$ac_cv_prog_RANLIB])

  RANLIB="$CC_RANLIB"], [])

dnl

dnl support sanitizers (if available)

dnl

PA_ARG_ENABLED([sanitizer],

 [compile with sanitizers enabled],

 [PA_ADD_CFLAGS([-fno-omit-frame-pointer])

  PA_ADD_CFLAGS([-fsanitize=address])

  PA_ADD_CFLAGS([-fsanitize=undefined])])

dnl

dnl Don't make symbols visible, there is no point and it just

dnl makes the code slower. This mainly affects ELF.

dnl

PA_ADD_CFLAGS([-fvisibility=hidden])

dnl

dnl If we have gcc, add appropriate code cleanliness options.  Do this

dnl here at the end, because configure relies on being able to use

dnl some very, very old C constructs.

dnl

PA_ADD_CFLAGS([-Wall])

PA_ARG_DISABLED([pedantic],

[disable some extra paranoid compiler warnings],

[],

[PA_ADD_CFLAGS([-W])

 PA_ADD_CFLAGS([-pedantic])

 PA_ADD_CFLAGS([-Wc90-c99-compat])

 PA_ADD_CFLAGS([-Wc99-compat])

 PA_ADD_CFLAGS([-Wc99-extensions])

])

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([-Wlong-long],[-Wno-long-long])

dnl This is needed because we intentionally expect strncpy() to fill

dnl in a zero-padded (not zero-terminated) buffer in several backends

PA_ADD_CFLAGS([-Wstringop-truncation],[-Wno-stringop-truncation])

dnl This is needed because we assume 2's-completement signed arithmetic;

dnl on compilers with gcc-like command line syntax we pass the -fwrapv

dnl option for exactly that reason.

PA_ADD_CFLAGS([-Wshift-negative-value],[-Wno-shift-negative-value])

dnl Want to turn this on at some point...

dnl PA_ADD_CFLAGS([-Wwrite-strings])

PA_ARG_ENABLED([werror],

 [compile with -Werror to error out on any warning],

 [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])]

)

dnl

dnl Test compiler features. On some compilers, this can be affected

dnl by -Werror options, so run this *after* those options are added.

dnl

PA_CHECK_BAD_STDC_INLINE

PA_C_TYPEOF

dnl

dnl support ccache

dnl

PA_ARG_ENABLED([ccache], [compile with ccache], [CC="ccache $CC"], [])

AC_CONFIG_FILES([Makefile doc/Makefile])

AC_OUTPUT