diff options
Diffstat (limited to 'm4/arch.m4')
| -rw-r--r-- | m4/arch.m4 | 90 |
1 files changed, 87 insertions, 3 deletions
@@ -61,14 +61,98 @@ AC_MSG_RESULT([${gawk_cv_linux_alpha_hack}]) dnl Check for z/OS Unix Systems Services AC_DEFUN([AC_ZOS_USS], [ AC_MSG_CHECKING([for z/OS USS compilation]) +AC_CACHE_VAL(ac_cv_zos_uss, [ if test "OS/390" = "`uname`" then - CFLAGS="$CFLAGS -D_ALL_SOURCE -DZOS_USS -DUSE_EBCDIC" - # Must rebuild awkgram.c and command.c from Bison for EBCDIC - rm -f awkgram.c command.c 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 Identify the compiler. + ac_zos_uss_cc_id=unknown + echo " $CC " | $EGREP ' (/bin/)?c89[ |_]' >/dev/null && ac_zos_uss_cc_id=c89 + echo " $CC " | $EGREP ' (/bin/)?c99[ |_]' >/dev/null && ac_zos_uss_cc_id=xlc + echo " $CC " | $EGREP ' (/bin/)?cc[ |_]' >/dev/null && ac_zos_uss_cc_id=cc + echo " $CC " | $EGREP ' (/bin/)?xlc[ |_]' >/dev/null && ac_zos_uss_cc_id=xlc + echo " $CC " | $EGREP ' (/bin/)?xlC[ |_]' >/dev/null && ac_zos_uss_cc_id=xlc++ + echo " $CC " | $EGREP ' (/bin/)?xlc\+\+[ |_]' >/dev/null && ac_zos_uss_cc_id=xlc++ + test "x$GCC" = "xyes" && ac_zos_uss_cc_id=gcc + dnl These feature test macros are needed on z/OS. + CPPFLAGS="$CPPFLAGS -D_ALL_SOURCE" + test "$ac_zos_uss_cc_id" != xlc++ && CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=600" + case "$ac_zos_uss_cc_id" in + c89) + dnl If the user has set CC=c89 and _C89_OPTIONS, then don't get in + dnl their way. c89 (as well as cc) pre-dates xlc, and accepts an + dnl option syntax that involves parentheses and cannot be handled + dnl in the usual way in C(PP)FLAGS. However, c89 will also accept + dnl options via the aforementioned environment variable, which + dnl gives the user one way around the problem. (If you're + dnl wondering about cc, it is meant for programs written in + dnl "Common Usage C" [a.k.a. K&R C] as opposed to "Standard C" + dnl [a.k.a. ANSI], and does not build gawk correctly.) + if test -n "$_C89_OPTIONS" + then + AC_MSG_NOTICE([CC = $CC]) + AC_MSG_NOTICE([_C89_OPTIONS = $_C89_OPTIONS]) + else + AC_MSG_ERROR([c89-setup-required +To build GNU Awk using "c89", please set + + _C89_OPTIONS="-W c,langlvl(stdc99,libext),haltonmsg(CCN3296)" + +in your environment, and reconfigure. (The above flags cannot be specified +in CFLAGS/CPPFLAGS, due to the parentheses.)]) + fi + ;; + gcc) + dnl GCC has not yet been ported to z/OS as of this writing + ;; + cc) + AC_MSG_ERROR([cc-invalid +The z/OS "cc" compiler does not build GNU Awk correctly. + +If the "xlc" or "c89" compiler is available, please set CC accordingly +and reconfigure. ("xlc" is the recommended compiler on z/OS.)]) + ;; + xlc*) + dnl This enables C99, and on z/OS 1.11, the setenv() prototype. + CFLAGS="$CFLAGS -qlanglvl=stdc99:libext" + dnl Use a compiler wrapper script to address some annoyances. + cat >zos-cc <<EOF +#!/bin/sh +# +# This wrapper script addresses two annoying peculiarities of the IBM +# xlc/c99 compiler on z/OS: +# +# 1. Missing header files are considered warnings by default rather +# than fatal errors; +# +# 2. Include directories specified with -I are searched _after_ the +# system include directories (for #include<> directives) rather +# than before. +# +# This script allows the code and the build system to assume standard +# compiler behavior. +# + +PS4='zos-cc: ' +REAL_CC="$CC" + +set -x +\$REAL_CC -qhaltonmsg=CCN3296 -qnosearch "\$[]@" -qsearch=/usr/include +EOF + chmod +x zos-cc + AC_MSG_NOTICE([wrapping $CC with zos-cc to obtain standard behavior]) + CC="`pwd`/zos-cc" + ;; + *) + AC_MSG_WARN([unrecognized compiler environment]) + ;; + esac +fi # ac_cv_zos_uss = yes ])dnl |