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restructure the build system: new ac_ifcpp macro for _reliably_ determining

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the state of the C Præprocessor at configuration time (simple checks, i.e.
set/unset, set+1/set+!1/unset, and more complex checks), including verbose
output; related cosmetics and variable naming cleanup
This commit is contained in:
tg 2009-07-19 14:59:40 +00:00
parent 45cac320e0
commit c7b8b512a8
1 changed files with 55 additions and 64 deletions
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119
Build.sh
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@ -1,5 +1,5 @@
#!/bin/sh #!/bin/sh
srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.407 2009/07/07 20:36:58 tg Exp $' srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.408 2009/07/19 14:59:40 tg Exp $'
#- #-
# Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009 # Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009
# Thorsten Glaser <tg@mirbsd.org> # Thorsten Glaser <tg@mirbsd.org>
@ -164,6 +164,26 @@ ac_testn() {
ac_testdone ac_testdone
} }
# ac_ifcpp cppexpr [!] label [!] checkif[!]0 [setlabelifcheckis[!]0] useroutput
ac_ifcpp() {
expr=$1; shift
ac_testn "$@" <<-EOF
int main(void) { return (
#$expr
0
#else
/* force a failure: expr is false */
thiswillneverbedefinedIhope()
#endif
); }
EOF
test x"$1" = x"!" && shift
f=$1
fu=`upper $f`
eval fv=\$HAVE_$fu
test x"$fv" = x"1"
}
ac_cppflags() { ac_cppflags() {
test x"$1" = x"" || fu=$1 test x"$1" = x"" || fu=$1
fv=$2 fv=$2
@ -285,7 +305,7 @@ else
fi fi
test x"$TARGET_OS" = x"" && TARGET_OS=`uname -s 2>/dev/null || uname` test x"$TARGET_OS" = x"" && TARGET_OS=`uname -s 2>/dev/null || uname`
warn= oswarn=
ccpc=-Wc, ccpc=-Wc,
ccpl=-Wl, ccpl=-Wl,
tsts= tsts=
@ -313,7 +333,7 @@ __setkey_r' >crypt.exp
: ${HAVE_SETLOCALE_CTYPE=0} : ${HAVE_SETLOCALE_CTYPE=0}
;; ;;
BeOS|Haiku) BeOS|Haiku)
warn=' and will currently not work' oswarn=' and will currently not work'
;; ;;
BSD/OS) BSD/OS)
: ${HAVE_SETLOCALE_CTYPE=0} : ${HAVE_SETLOCALE_CTYPE=0}
@ -373,12 +393,12 @@ OSF1)
Plan9) Plan9)
CPPFLAGS="$CPPFLAGS -D_POSIX_SOURCE -D_LIMITS_EXTENSION" CPPFLAGS="$CPPFLAGS -D_POSIX_SOURCE -D_LIMITS_EXTENSION"
CPPFLAGS="$CPPFLAGS -D_BSD_EXTENSION -D_SUSV2_SOURCE" CPPFLAGS="$CPPFLAGS -D_BSD_EXTENSION -D_SUSV2_SOURCE"
warn=' and will currently not work' oswarn=' and will currently not work'
CPPFLAGS="$CPPFLAGS -DMKSH_ASSUME_UTF8 -DMKSH_UNEMPLOYED" CPPFLAGS="$CPPFLAGS -DMKSH_ASSUME_UTF8 -DMKSH_UNEMPLOYED"
;; ;;
PW32*) PW32*)
HAVE_SIG_T=0 # incompatible HAVE_SIG_T=0 # incompatible
warn=' and will currently not work' oswarn=' and will currently not work'
: ${HAVE_SETLOCALE_CTYPE=0} : ${HAVE_SETLOCALE_CTYPE=0}
;; ;;
QNX) QNX)
@ -395,7 +415,7 @@ SunOS)
;; ;;
syllable) syllable)
CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE" CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
warn=' and will currently not work' oswarn=' and will currently not work'
;; ;;
ULTRIX) ULTRIX)
: ${CC=cc -YPOSIX} : ${CC=cc -YPOSIX}
@ -406,33 +426,15 @@ UWIN*)
ccpc='-Yc,' ccpc='-Yc,'
ccpl='-Yl,' ccpl='-Yl,'
tsts=" 3<>/dev/tty" tsts=" 3<>/dev/tty"
warn="; it will compile, but the target" oswarn="; it will compile, but the target"
warn="$warn${nl}platform itself is very flakey/unreliable" oswarn="$oswarn${nl}platform itself is very flakey/unreliable"
: ${HAVE_SETLOCALE_CTYPE=0} : ${HAVE_SETLOCALE_CTYPE=0}
;; ;;
*) *)
warn='; it may or may not work' oswarn='; it may or may not work'
;; ;;
esac esac
case " $CPPFLAGS " in
*\ -DMKSH_ASSUME_UTF8\ *|*\ -DMKSH_ASSUME_UTF8=*)
: ${HAVE_SETLOCALE_CTYPE=0}
;;
esac
case " $CPPFLAGS " in
*\ -DMKSH_CONSERVATIVE_FDS\ *|*\ -DMKSH_CONSERVATIVE_FDS=*)
check_categories=$check_categories,convfds
;;
esac
if test -n "$warn"; then
echo "Warning: mksh has not yet been ported to or tested on your" >&2
echo "operating system '$TARGET_OS'$warn. If you can provide" >&2
echo "a shell account to the developer, this may improve; please" >&2
echo "drop us a success or failure notice or even send in diffs." >&2
fi
: ${CC=cc} ${NROFF=nroff} : ${CC=cc} ${NROFF=nroff}
test 0 = $r && echo | $NROFF -v 2>&1 | grep GNU >/dev/null 2>&1 && \ test 0 = $r && echo | $NROFF -v 2>&1 | grep GNU >/dev/null 2>&1 && \
NROFF="$NROFF -c" NROFF="$NROFF -c"
@ -457,6 +459,12 @@ OSF1)
vv '|' "uname -a >&2" vv '|' "uname -a >&2"
;; ;;
esac esac
test -z "$oswarn" || echo >&2 "
Warning: mksh has not yet been ported to or tested on your
operating system '$TARGET_OS'$oswarn. If you can provide
a shell account to the developer, this may improve; please
drop us a success or failure notice or even send in diffs.
"
$e "$bi$me: Building the MirBSD Korn Shell$ao $ui$dstversion$ao" $e "$bi$me: Building the MirBSD Korn Shell$ao $ui$dstversion$ao"
# #
@ -679,10 +687,8 @@ ac_flags 0 compiler_works '' 'if the compiler works'
test 1 = $HAVE_CAN_COMPILER_WORKS || exit 1 test 1 = $HAVE_CAN_COMPILER_WORKS || exit 1
HAVE_COMPILER_KNOWN=0 HAVE_COMPILER_KNOWN=0
test $ct = unknown || HAVE_COMPILER_KNOWN=1 test $ct = unknown || HAVE_COMPILER_KNOWN=1
ac_testn compiler_fails '' 'if the compiler does not fail correctly' <<-EOF if ac_ifcpp 'if 0' compiler_fails '' \
int main(void) { return (thiswillneverbedefinedIhope()); } 'if the compiler does not fail correctly'; then
EOF
if test 1 = $HAVE_COMPILER_FAILS; then
save_CFLAGS=$CFLAGS save_CFLAGS=$CFLAGS
: ${HAVE_CAN_DELEXE=x} : ${HAVE_CAN_DELEXE=x}
if test $ct = dmc; then if test $ct = dmc; then
@ -703,15 +709,8 @@ if test 1 = $HAVE_COMPILER_FAILS; then
EOF EOF
test 1 = $HAVE_COMPILER_STILL_FAILS && exit 1 test 1 = $HAVE_COMPILER_STILL_FAILS && exit 1
fi fi
ac_testn couldbe_tcc '!' compiler_known 0 'if this could be tcc' <<-EOF if ac_ifcpp 'ifdef __TINYC__' couldbe_tcc '!' compiler_known 0 \
#ifdef __TINYC__ 'if this could be tcc'; then
int main(void) { return (0); }
#else
/* force a failure: __TINYC__ not defined */
int main(void) { return (thiswillneverbedefinedIhope()); }
#endif
EOF
if test 1 = $HAVE_COULDBE_TCC; then
ct=tcc ct=tcc
CPP='cpp -D__TINYC__' CPP='cpp -D__TINYC__'
fi fi
@ -758,6 +757,15 @@ fi
test $ct = icc && DOWARN="$DOWARN -wd1419" test $ct = icc && DOWARN="$DOWARN -wd1419"
NOWARN=$save_NOWARN NOWARN=$save_NOWARN
#
# CPPFLAGS: which ones are (pre-)set?
#
ac_ifcpp 'ifdef MKSH_ASSUME_UTF8' isset_MKSH_ASSUME_UTF8 '' \
'if MKSH_ASSUME_UTF8 is set' && : ${HAVE_SETLOCALE_CTYPE=0}
ac_ifcpp 'ifdef MKSH_CONSERVATIVE_FDS' isset_MKSH_CONSERVATIVE_FDS '' \
'if MKSH_CONSERVATIVE_FDS is set' && \
check_categories=$check_categories,convfds
# #
# Compiler: extra flags (-O2 -f* -W* etc.) # Compiler: extra flags (-O2 -f* -W* etc.)
# #
@ -898,26 +906,8 @@ NOWARN=$save_NOWARN
# #
# mksh: flavours (full/small mksh, omit certain stuff) # mksh: flavours (full/small mksh, omit certain stuff)
# #
ac_testn mksh_full '' "if a full-featured mksh is requested" <<-'EOF' if ac_ifcpp 'ifdef MKSH_SMALL' isset_MKSH_SMALL '' \
#ifdef MKSH_SMALL "if a reduced-feature mksh is requested"; then
/* force a failure: we want a small mksh */
int main(void) { return (thiswillneverbedefinedIhope()); }
#else
/* force a success: we want a full mksh */
int main(void) { return (0); }
#endif
EOF
ac_testn mksh_reduced '' "if a reduced-feature sh is requested" <<-'EOF'
#ifdef MKSH_BINSHREDUCED
/* force a success: we want a reduced mksh-as-bin-sh */
int main(void) { return (0); }
#else
/* force a failure: we want a full mksh, always */
int main(void) { return (thiswillneverbedefinedIhope()); }
#endif
EOF
if test 0 = $HAVE_MKSH_FULL; then
if test $ct = xlc; then if test $ct = xlc; then
ac_flags 1 fnoinline -qnoinline ac_flags 1 fnoinline -qnoinline
else else
@ -930,9 +920,9 @@ if test 0 = $HAVE_MKSH_FULL; then
check_categories=$check_categories,smksh check_categories=$check_categories,smksh
check_categories=$check_categories,convfds check_categories=$check_categories,convfds
fi fi
if test 1 = $HAVE_MKSH_REDUCED; then ac_ifcpp 'ifdef MKSH_BINSHREDUCED' isset_MKSH_BINSHREDUCED '' \
check_categories=$check_categories,binsh "if a reduced-feature sh is requested" && \
fi check_categories=$check_categories,binsh
# #
# Environment: headers # Environment: headers
@ -1272,7 +1262,8 @@ CC=$save_CC; LDFLAGS=$save_LDFLAGS; LIBS=$save_LIBS
# other checks # other checks
# #
fd='if to use persistent history' fd='if to use persistent history'
ac_cache PERSISTENT_HISTORY || test 11 != $HAVE_FLOCK_EX$HAVE_MKSH_FULL || fv=1 ac_cache PERSISTENT_HISTORY || \
test 10 != $HAVE_FLOCK_EX$HAVE_ISSET_MKSH_SMALL || fv=1
test 1 = $fv || check_categories=$check_categories,no-histfile test 1 = $fv || check_categories=$check_categories,no-histfile
ac_testdone ac_testdone
ac_cppflags ac_cppflags