RE: [HACKERS] PostgreSQL v6.4 BETA2 ...
От | Taral |
---|---|
Тема | RE: [HACKERS] PostgreSQL v6.4 BETA2 ... |
Дата | |
Msg-id | 000001bdf71e$43941660$3b291f0a@taral обсуждение исходный текст |
Ответ на | Re: [HACKERS] PostgreSQL v6.4 BETA2 ... ("Thomas G. Lockhart" <lockhart@alumni.caltech.edu>) |
Список | pgsql-hackers |
> autoconf concludes that "gcc -E" is equivalent to cpp on my system. And > it is, except that it needs an explicit bare "-" argument to try reading > from a pipe, which is how cpp was being used. I can test for "gcc" being > in the command, and add the argument, _or_ can change the scripts to > write a temporary file instead (they already write some temp files). Add the following to configure.in after AC_PROG_CPP and use the resultant flag from CPPSTDIN: (either nothing or -) --- cut here --- AC_DEFUN(AC_TRY_CPPSTDIN, [AC_REQUIRE_CPP()dnl cat > conftest.$ac_ext <<EOF [#]line __oline__ "configure" #include "confdefs.h" [$1] EOF ac_try="$ac_cpp $CPPSTDIN <conftest.$ac_ext >/dev/null 2>conftest.out" AC_TRY_EVAL(ac_try) ac_err=`grep -v '^ *+' conftest.out` if test -z "$ac_err"; then ifelse([$2], , :, [rm -rf conftest* $2]) else echo "$ac_err" >&AC_FD_CC echo "configure: failed program was:" >&AC_FD_CC cat conftest.$ac_ext >&AC_FD_CC ifelse([$3], , , [ rm -rf conftest* $3 ])dnl fi rm -f conftest*]) AC_MSG_CHECKING(how to use cpp with stdin) if test -z "$CPPSTDIN"; then AC_CACHE_VAL(ac_cv_cpp_stdin, [ CPPSTDIN="" AC_TRY_CPPSTDIN([#include <assert.h> Syntax Error], , CPPSTDIN="-") ac_cv_cpp_stdin="$CPPSTDIN"]) CPPSTDIN="$ac_cv_cpp_stdin" else ac_cv_cpp_stdin="$CPPSTDIN" fi AC_MSG_RESULT($CPP $CPPSTDIN) AC_SUBST(CPPSTDIN) --- cut here --- Taral P.S. Yes, do use the DEFUN just in case we want to add more broken variants later :)
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