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- dnl Process this file with autoconf to produce a configure script for gzip
- dnl
- dnl Written by friedman@prep.ai.mit.edu 28-Dec-92
- dnl Last modified 26-Jan-93
- dnl "Usage: ACL_HAVE_SHELL_HACK(ACTION_IF_EXISTS [, ACTION_IF_NOT_EXISTS])"
- dnl
- define(ACL_HAVE_SHELL_HACK, [dnl
- echo "checking for #! kernel hack"
- cat <<'__EOF__' > conftest.csh
- #!/bin/csh -f
- setenv SHELL /bin/csh
- # Avoid tcsh bug 'Bad Hertz Value':
- setenv HZ 60
- # Make sure foo doesn't get exported into the environment
- # Astoundingly, some versions of csh don't have unsetenv.
- if (${?foo}) unsetenv foo >& /dev/null
- if (${?foo}) unset foo
- set output="`./conftest.sh`"
- if ( "$[]output" == "foo=bar" ) then
- exit 0
- endif
- exit 1
- __EOF__
- cat <<'__EOF__' > conftest.sh
- #!/bin/sh
- # If this is really run with sh, then 1st positional arg will be "foo=bar".
- # If this script was executed by csh, then a shell variable "foo" will have
- # the value "var".
- set foo=bar
- echo "$[]*"
- __EOF__
- chmod 777 conftest.csh conftest.sh
- (csh -f ./conftest.csh) 2> /dev/null
- if test $? = 0 ; then
- :; $1
- else
- :; $2
- fi
- rm -f conftest.csh conftest.sh
- ])dnl
- dnl
- dnl Same as AC_RETSIGTYPE, but use a void default.
- dnl
- define(AC_RETSIGTYP,
- [AC_COMPILE_CHECK([return type of signal handlers],
- [#include <sys/types.h>
- #include <signal.h>
- #ifdef signal
- #undef signal
- #endif
- extern int (*signal ()) ();],
- [int i;],
- [AC_DEFINE(RETSIGTYPE, int)],
- [],
- )]
- )dnl
- dnl
- dnl
- dnl End of local macros
- dnl
- AC_INIT(gzip.c)
- AC_PROG_CC
- dnl AC_PROG_CPP
- dnl
- dnl Try to assemble match.S with and without leading underline.
- dnl cc -E produces incorrect asm files on SVR4, we must use /lib/cpp.
- dnl Also, "gcc -E match.s" ignores -E, so we must use match.S.
- echo checking for underline in external names
- test -z "$CPP" -a -f /lib/cpp && CPP=/lib/cpp
- test -z "$CPP" && CPP="$CC -E"
- cat > conftest.c <<EOF
- int foo() {return 0;}
- EOF
- $CC -c conftest.c > /dev/null 2>&1
- if nm conftest.o | grep _foo > /dev/null 2>&1 ; then
- :
- else
- CPP="${CPP} -DNO_UNDERLINE"
- fi
- echo checking for assembler
- rm -f _match.o conftest.[co]
- $CPP $srcdir/match.S > _match.s
- if grep error < _match.s > /dev/null; then
- OBJA=""
- elif $CC -c _match.s >/dev/null 2>&1 && test -f _match.o; then
- DEFS="${DEFS} -DASMV"
- OBJA=match.o
- fi
- rm -f _match.s _match.o
- dnl
- AC_PROG_INSTALL
- AC_AIX
- AC_MINIX
- AC_ISC_POSIX
- AC_DYNIX_SEQ
- AC_STDC_HEADERS
- dnl if STDC_HEADERS can't be defined, look for special files:
- AC_HEADER_CHECK(string.h, ,AC_DEFINE(NO_STRING_H))
- AC_HEADER_CHECK(stdlib.h, ,AC_DEFINE(NO_STDLIB_H))
- AC_HEADER_CHECK(memory.h, ,AC_DEFINE(NO_MEMORY_H))
- AC_HEADER_CHECK(fcntl.h, ,AC_DEFINE(NO_FCNTL_H))
- AC_HAVE_HEADERS(unistd.h)
- utime=0
- AC_HEADER_CHECK(utime.h, utime=1 ,AC_DEFINE(NO_UTIME_H))
- if test $utime -eq 0; then
- AC_HAVE_HEADERS(sys/utime.h)
- fi
- AC_DIR_HEADER
- AC_XENIX_DIR
- AC_ALLOCA
- AC_RETSIGTYP
- ACL_HAVE_SHELL_HACK([SEDCMD="1d"], [SEDCMD=""])
- AC_PREFIX(gzip)
- AC_SUBST(OBJA)dnl
- AC_SUBST(SEDCMD)dnl
- AC_OUTPUT(Makefile)
-