diff options
Diffstat (limited to 'm4/arch.m4')
| -rw-r--r-- | m4/arch.m4 | 57 |
1 files changed, 40 insertions, 17 deletions
@@ -64,31 +64,54 @@ AC_MSG_CHECKING([for z/OS USS compilation]) AC_CACHE_VAL(ac_cv_zos_uss, [ if test "OS/390" = "`uname`" then + ac_cv_zos_uss=yes +else + ac_cv_zos_uss=no +fi +])dnl +AC_MSG_RESULT([${ac_cv_zos_uss}]) +if test "x$ac_cv_zos_uss" = "xyes" +then + dnl These feature test macros are needed on z/OS. CPPFLAGS="$CPPFLAGS -D_ALL_SOURCE -D_XOPEN_SOURCE=600" - if test "x$GCC" != "xyes" + dnl If _C89_OPTIONS is set, then assume the user is building with the c89 + dnl compiler frontend, and knows what they are doing. c89 (as well as cc) + dnl pre-dates xlc, and accepts an option syntax that involves parentheses + dnl and cannot be handled in the usual way in C(PP)FLAGS. However, c89 + dnl will also accept options via the aforementioned environment variable, + dnl which gives the user one way around the problem. (If you're wondering + dnl about cc, it is meant for programs written in "Common Usage C" + dnl [a.k.a. K&R C] as opposed to "Standard C" [a.k.a. ANSI], and does not + dnl build gawk correctly.) + if test -n "$_C89_OPTIONS" then - dnl If the user is using the "cc" or "c89" compiler frontends, then - dnl give up. These do not accept standard XL C -qfoobar options, and - dnl instead use a devil's-spawn option syntax involving parentheses. - dnl (For example, the below CFLAGS addendum becomes - dnl "-W c,langlvl(stdc99,libext)". Good luck quoting that.) - if echo " $CC " | $EGREP ' (/bin/)?(cc|c89) ' >/dev/null + AC_MSG_NOTICE([_C89_OPTIONS = $_C89_OPTIONS]) + elif test "x$GCC" != "xyes" + then + if echo " $CC " | $EGREP ' (/bin/)?cc ' >/dev/null + then + AC_MSG_ERROR([cc-invalid +The z/OS "cc" compiler does not build GNU Awk correctly. + +If the "xlc" or "c89" compiler is available, please set CC accordingly +and reconfigure. ("xlc" is the recommended compiler on z/OS.)]) + fi + if echo " $CC " | $EGREP ' (/bin/)?c89 ' >/dev/null then -: AC_MSG_ERROR([invalid-cc -GNU Awk does not support the "cc" nor "c89" compiler frontends on z/OS. -Please set CC to "c99" or one of the "xlc" frontends.]) + AC_MSG_ERROR([c89-setup-required +To build GNU Awk using "c89", please set + + _C89_OPTIONS="-W c,langlvl(stdc99,libext),haltonmsg(CCN3296)" + +in your environment, and reconfigure. (The above flags cannot be specified +in CFLAGS/CPPFLAGS, due to the parentheses.)]) fi dnl This enables C99, and on z/OS 1.11, the setenv() prototype. -: CFLAGS="$CFLAGS -qlanglvl=stdc99:libext" + CFLAGS="$CFLAGS -qlanglvl=stdc99:libext" dnl This is needed so that xlc considers a missing header file to be an dnl error and not a warning. (Yes, the latter is in fact the default dnl behavior on z/OS.) -: CPPFLAGS="$CPPFLAGS -qhaltonmsg=CCN3296" + CPPFLAGS="$CPPFLAGS -qhaltonmsg=CCN3296" fi - ac_cv_zos_uss=yes -else - ac_cv_zos_uss=no fi ])dnl -AC_MSG_RESULT([${ac_cv_zos_uss}]) -])dnl |