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Diffstat (limited to 'mcon/U/Checkcc.U')
| -rw-r--r-- | mcon/U/Checkcc.U | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/mcon/U/Checkcc.U b/mcon/U/Checkcc.U new file mode 100644 index 0000000..3cae05c --- /dev/null +++ b/mcon/U/Checkcc.U @@ -0,0 +1,135 @@ +?RCS: $Id$ +?RCS: +?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi +?RCS: +?RCS: You may redistribute only under the terms of the Artistic License, +?RCS: as specified in the README file that comes with the distribution. +?RCS: You may reuse parts of this distribution only within the terms of +?RCS: that same Artistic License; a copy of which may be found at the root +?RCS: of the source tree for dist 4.0. +?RCS: +?RCS: Copyright (c) 2000, Jarkko Hietaniemi +?RCS: +?X: +?X: This unit produces a bit of shell code that must be dotted in order +?X: to make quick check on whether the current C compiler is working. +?X: +?MAKE:Checkcc ccname ccversion: Myread Warn startsh cat contains test +?MAKE: -pick add $@ %< +?S:ccname: +?S: This can set either by hints files or by Configure. If using +?S: gcc, this is gcc, and if not, usually equal to cc, unimpressive, no? +?S: Some platforms, however, make good use of this by storing the +?S: flavor of the C compiler being used here. For example if using +?S: the Sun WorkShop suite, ccname will be 'workshop'. +?S:. +?S:ccversion: +?S: This can set either by hints files or by Configure. If using +?S: a (non-gcc) vendor cc, this variable may contain a version for +?S: the compiler. +?S:. +?F:./checkcc ./trygcc !checktmp +?V:despair +?T:trygcc +?LINT:extern cc rm ccflags ldflags +?LINT:change cc ccflags +?LINT:usefile checktmp +?INIT:ccname='' +?INIT:ccversion='' +: generate the trygcc script for later perusal +cat <<EOS >trygcc +$startsh +EOS +cat <<'EOSC' >>trygcc +case "$cc" in +'') ;; +*) $rm -f try try.* + $cat >try.c <<EOM +int main(int argc, char *argv[]) { + (void) argc; + (void) argv; + return 0; +} +EOM + if $cc -o try $ccflags $ldflags try.c; then + : + else + echo "Uh-oh, the C compiler '$cc' doesn't seem to be working." >&4 + despair=yes + trygcc=yes + case "$cc" in + *gcc*) trygcc=no ;; + esac + case "`$cc -v -c try.c 2>&1`" in + *gcc*) trygcc=no ;; + esac + if $test X"$trygcc" = Xyes; then + if gcc -o try -c try.c; then + echo " " + echo "You seem to have a working gcc, though." >&4 + rp="Would you like to use it?" + dflt=y + if $test -f myread; then + . ./myread + else + if $test -f UU/myread; then + . ./UU/myread + else + echo "Cannot find myread, sorry. Aborting." >&2 + exit 1 + fi + fi + case "$ans" in + [yY]*) cc=gcc; ccname=gcc; ccflags=''; despair=no; +?X: Look whether we have 'call-back units' generated by hints that would +?X: seemingly affect the compiling environment. + $cat *.cbu >checktmp 2>/dev/null + if $contains ccflags checktmp >/dev/null; then + ./warn 4>&4 <<EOM +Any previous setting of the C compiler flags has been lost. +It may be necessary to pass -Dcc=gcc to Configure right away. +EOM + fi;; + esac + fi + fi + fi + $rm -f try try.* + ;; +esac +EOSC + +: generate the checkcc script for later perusal +cat <<EOS >checkcc +$startsh +EOS +cat <<'EOSC' >>checkcc +case "$cc" in +'') ;; +*) $rm -f try try.* + $cat >try.c <<EOM +int main(int argc, char *argv[]) { + (void) argc; + (void) argv; + return 0; +} +EOM + if $cc -o try $ccflags $ldflags try.c; then + : + else + if $test X"$despair" = Xyes; then + echo "Uh-oh, the C compiler '$cc' doesn't seem to be working." >&4 + fi + $cat >&4 <<EOM +You need to find a working C compiler. +Either (purchase and) install the C compiler supplied by your OS vendor, +or for a free C compiler try http://gcc.gnu.org/ +I cannot continue any further, aborting. +EOM + exit 1 + fi + $rm -f try try.* + ;; +esac +EOSC + |