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Merge bitcoin/bitcoin#22845: build: improve check for ::(w)system

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3ec633ef1a build: improve check for ::(w)system (fanquake)

Pull request description:

  `AC_DEFINE()` takes `HAVE_STD__SYSTEM || HAVE_WSYSTEM` literally, meaning you
  end up with the following in bitcoin-config.h:
  ```cpp
  /* std::system or ::wsystem */
  #define HAVE_SYSTEM HAVE_STD__SYSTEM || HAVE_WSYSTEM
  ```

  This works for the preprocessor, because `HAVE_SYSTEM`, is defined, just unusually. Remove this in favor of setting `have_any_system` in either case, given we don't actually use `HAVE_STD__SYSTEM` or `HAVE_WSYSTEM`, and defining `HAVE_SYSTEM` to 1 thereafter.

ACKs for top commit:
  laanwj:
    Code review ACK 3ec633ef1a

Tree-SHA512: 02c39ba3179136ec1dc28df026b7fa5d732914c85622298ba7ec880f1ae9324208d322a47be451a5c2ff2e165ad1d446bae92e7018db8e517e7ac38fca25a0a3
This commit is contained in:
W. J. van der Laan 2021-09-16 20:05:07 +02:00
commit 82a85216c3
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GPG key ID: 1E4AED62986CD25D
1 changed files with 6 additions and 3 deletions
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9
configure.ac
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@ -1229,13 +1229,14 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
[ AC_MSG_RESULT(no); HAVE_WEAK_GETAUXVAL=0 ]
)
have_any_system=no
AC_MSG_CHECKING([for std::system])
AC_LINK_IFELSE(
[ AC_LANG_PROGRAM(
[[ #include <cstdlib> ]],
[[ int nErr = std::system(""); ]]
)],
[ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_STD__SYSTEM, 1, Define to 1 if std::system is available.)],
[ AC_MSG_RESULT(yes); have_any_system=yes],
[ AC_MSG_RESULT(no) ]
)
@ -1245,11 +1246,13 @@ AC_LINK_IFELSE(
[[ ]],
[[ int nErr = ::_wsystem(""); ]]
)],
[ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_WSYSTEM, 1, Define to 1 if ::wsystem is available.)],
[ AC_MSG_RESULT(yes); have_any_system=yes],
[ AC_MSG_RESULT(no) ]
)
AC_DEFINE([HAVE_SYSTEM], [HAVE_STD__SYSTEM || HAVE_WSYSTEM], [std::system or ::wsystem])
if test "x$have_any_system" != "xno"; then
AC_DEFINE(HAVE_SYSTEM, 1, Define to 1 if std::system or ::wsystem is available.)
fi
LEVELDB_CPPFLAGS=
LIBLEVELDB=