source: rtems/aclocal/canonicalize-tools.m4 @ 98100d2

4.104.114.84.9
Last change on this file since 98100d2 was 98100d2, checked in by Joel Sherrill <joel.sherrill@…>, on Jun 27, 1998 at 5:09:47 PM

Monstrous patch from Ralf Corsepius <corsepiu@…>. I have
made no attempt to divide the comments up and place them with just
the appropriate files. Here is an excerpt from Ralf's email:

Changes including comments on changes I made after cycling through
all the targets:

  • Added ranlib support. Now all targets use "ranlib" instead of "ar -s" to build an index for a library. If ranlib isn't detected during configuration, check if ar -s is working and try "ar -s" instead of
  • Removed $(XXX_FOR_TARGET) from make/target.cfg.in, use $(XXX) instead now.
  • gcc-target-default.cfg: LINK_XXXX-defines reworked to solve the -l problem under posix (cf gcc-target-default.cfg)
  • rtems-glom replaced by Makefile-rules inside of the wrapup/Makefile.in that has been using rtems-glom until now.
  • Removed CCC and friends in gcc-target-default.cfg, as they have been breaking CXX support.
  • Removed CONFIG.$(TARGET_ARCH).CC lines from several custom/*.cfg files, because this is now set in custom/default.cfg.
  • Added aclocal/ar-s.m4, check whether "ar -s" is working
  • Added aclocal/cygwin.m4 and aclocal/exeext.m4.
  • Reworked aclocal/canonicalize-tools.m4: Added ar -s check; fixes for problems when XXX_FOR_TARGET is given via environment variables (didn't work for gcc until now), adding cygwin check, improved autoconf-cache handling.
  • Removed -l from make rule dependencies. LINK_LIBS is now allowed to contain -L and -l. LINK_OBJS and LINK_FILES must not contain -L or -l. gcc28 make-exe rules now link using $(LINK_OBJS) $(LINK_LIBS) => Almost all custom/*.cfg are modified. This is very likely to break something because of typos or having missed to edit a file.

Open problems, known bugs, things I didn't do:

  • custom/p4000.cfg seems to be out of date and requires to be reviewed.

(JRS NOTE: It is subordinate p4650 and p4600 -- both of which build ok

after minor changes.)

  • custom/psim.cfg needs to be reviewed, I added some changes to it, I am insecure about.

(JRS NOTE: psim had a minor problem endif/endef swapped but runs fine.)

  • rtems-glom.in can now be removed.
  • gcc*.cfg files "make depend" rules don't honor language specific flags (e.g CXXFLAGS is ignored for *.cc) - Nothing to worry about now, but may cause problems for hosts/targets not using gcc or rtems-add-ons that use external packages.
  • AFAIS, the no_bsp BSP can't be build anymore, i.e. configure refused to configure for it whatever I tried.
  • The toplevel and toplevel+1 README files are quite out-dated
  • cygwin.m4 isn't of much use for rtems. In most cases (cf. aclocal/*.m4) it is worked around by directly using $host_os. I think I'll remove it soon after the next snapshot
  • Before release the cygwin patch needs to be tested under cygwin. I may have broken/missed something (esp. the sed-pattern to convert
    into / may be broken).
  • You should try to build/run the posix-BSP under solaris - I don't expect problems, but I am not 100% sure, esp. with regard to ranlib/ar -s.
  • You should consider to convert all make/compilers/*.cfg files into make/compilers/*.cfg.in files and let autoconf generate the *.cfg. This may help getting rid of some if/then/else statements and help hard-coding some defines into those files in future and shouldn't disturb now.
  • Not having installed libc.a/libm.a on a host may still break building rtems, esp. when using -disable-gcc28 as the gcc27-configuration scheme directly accesses libc.a and libm.a. The problem should not appear when using gcc28 because it references libc/libm only through -lc and -lm which may be static or dynamic (I didn't test this).
  • shgen is not yet included (I didn't yet have enough time to integrate it).
  • I know about a few more configure-probs (esp. cross-checking --enable-* flags).

+ warn/refuse to configure when --enable-libcdir and

--enable-gcc28 are given.

+ force --enable-libcdir when --disable-gcc28 is given

  • Replaced KSHELL with @KSH@ in some shell scripts generated by configure.in.
  • Added a dependency to aclocal/*.m4 in the toplevel Makefile => configure and aclocal.m4 will now be rebuild when any aclocal/*.m4 file is changed
  • Some changes to aclocal/gcc-pipe.m4 and aclocal/gcc-specs.m4
  • Replaced i3456?86-unknown-freebsd2.12? with i3456?86-*freebsd2.* in configure.in, as I suppose there might exist a variety of valid vendors (2nd field of the name-tripple)
  • Disabled override MAKEFLAGS in toplevel Makefile.in - Potential side-effects are not really clear to me.
  • In mvme162.cfg, $(LINK_LIBS) is missing in the CC line in gcc28's make-exe rule (yet another one I missed to edit). Just append $(LINK_LIBS) to the "CC" line, like I hopefully did to ALL other custom/*.cfg files.
  • the problem with mvme162lx.cfg is a follow-up problem of the mvme162.cfg-bug.
  • mvme162/console and idp/console had variables named Buffer which conflicted with similarly named variables in some tests.
  • Property mode set to 100644
File size: 2.7 KB
Line 
1dnl $Id$
2dnl
3dnl Set target tools
4dnl
5dnl 98/06/23 Ralf Corsepius     (corsepiu@faw.uni-ulm.de)
6dnl             fixing cache/environment variable handling
7dnl             adding checks for cygwin/egcs '\\'-bug
8dnl             adding checks for ranlib/ar -s problem
9dnl
10dnl 98/02/12 Ralf Corsepius     (corsepiu@faw.uni-ulm.de)
11dnl
12
13AC_DEFUN(RTEMS_GCC_PRINT,
14[ case $host_os in
15  *cygwin32*)
16    dnl FIXME: Hack for cygwin/egcs reporting mixed '\\' and '/'
17    dnl        Should be removed once cygwin/egcs reports '/' only
18    $1=`$CC_FOR_TARGET --print-prog-name=$2 | sed -e "s%\\\\%/%g" `
19    ;;
20  *)
21    $1=`$CC_FOR_TARGET --print-prog-name=$2`
22    ;;
23  esac
24])
25
26AC_DEFUN(RTEMS_PATH_TOOL,
27[
28AC_MSG_CHECKING([target's $2])
29AC_CACHE_VAL(ac_cv_path_$1,:)
30AC_MSG_RESULT([$ac_cv_path_$1])
31
32if test -n "$ac_cv_path_$1"; then
33  dnl retrieve the value from the cache
34  $1=$ac_cv_path_$1
35else
36  dnl the cache was not set
37  if test -z "[$]$1" ; then
38    if test "$rtems_cv_prog_gcc" = "yes"; then
39      # We are using gcc, ask it about its tool
40      # NOTE: Necessary if gcc was configured to use the target's
41      # native tools or uses prefixes for gnutools (e.g. gas instead of as)
42      RTEMS_GCC_PRINT($1,$2)
43    fi
44  else
45    # The user set an environment variable.
46    # Check whether it is an absolute path, otherwise AC_PATH_PROG
47    # will override the environment variable, which isn't what the user
48    # intends
49    AC_MSG_CHECKING([whether environment variable $1 is an absolute path])
50    case "[$]$1" in
51    /*) # valid
52      AC_MSG_RESULT("yes")
53    ;;
54    *)  # invalid for AC_PATH_PROG
55      AC_MSG_RESULT("no")
56      AC_MSG_ERROR([***]
57        [Environment variable $1 should ether]
58        [be unset (preferred) or contain an absolute path])
59    ;;
60    esac
61  fi
62
63  AC_PATH_PROG($1,"$program_prefix"$2,$3)
64fi
65])
66
67AC_DEFUN(RTEMS_CANONICALIZE_TOOLS,
68[AC_REQUIRE([RTEMS_PROG_CC])dnl
69
70dnl FIXME: What shall be done if these tools are not available?
71  RTEMS_PATH_TOOL(AR_FOR_TARGET,ar,no)
72  RTEMS_PATH_TOOL(AS_FOR_TARGET,as,no)
73  RTEMS_PATH_TOOL(LD_FOR_TARGET,ld,no)
74  RTEMS_PATH_TOOL(NM_FOR_TARGET,nm,no)
75
76dnl special treatment of ranlib
77  RTEMS_PATH_TOOL(RANLIB_FOR_TARGET,ranlib,no)
78  if test "$RANLIB_FOR_TARGET" = "no"; then
79    # ranlib wasn't found; check if ar -s is available
80    RTEMS_AR_FOR_TARGET_S
81    if test $rtems_cv_AR_FOR_TARGET_S = "yes" ; then
82      dnl override RANLIB_FOR_TARGET's cache
83      ac_cv_path_RANLIB_FOR_TARGET="$AR_FOR_TARGET -s"
84      RANLIB_FOR_TARGET=$ac_cv_path_RANLIB_FOR_TARGET
85    else
86      AC_MSG_ERROR([***]
87        [Can't figure out how to build a library index]
88        [Nether ranlib nor ar -s seem to be available] )
89    fi
90  fi
91
92dnl NOTE: These may not be available if not using gnutools
93  RTEMS_PATH_TOOL(OBJCOPY_FOR_TARGET,objcopy,no)
94  RTEMS_PATH_TOOL(SIZE_FOR_TARGET,size,no)
95])
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