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configure.ac: supplement AC_CHECK_FUNCS() (function link test) with AC_CHECK_DECLS() (function declaration test) to avoid false positives. fixes various build failure modes.

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Daniel Pouzzner 2020-10-09 22:18:51 -05:00
parent 570f55a0e3
commit 9de5eea1d9
1 changed files with 38 additions and 1 deletions
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39
configure.ac
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@ -67,11 +67,46 @@ AC_CHECK_SIZEOF([long long])
AC_CHECK_SIZEOF([long])
AC_CHECK_SIZEOF([time_t])
AC_CHECK_TYPES([__uint128_t])
AC_CHECK_FUNCS([gethostbyname getaddrinfo gettimeofday gmtime_r inet_ntoa memset socket strftime])
AC_CHECK_HEADERS([arpa/inet.h fcntl.h limits.h netdb.h netinet/in.h stddef.h time.h sys/ioctl.h sys/socket.h sys/time.h errno.h])
AC_CHECK_LIB([network],[socket])
AC_C_BIGENDIAN
# check if functions of interest are linkable, but also check if
# they're declared by the expected headers, and if not, supersede the
# unusable positive from AC_CHECK_FUNCS().
AC_CHECK_FUNCS([gethostbyname getaddrinfo gettimeofday gmtime_r inet_ntoa memset socket strftime])
AC_CHECK_DECLS([gethostbyname, getaddrinfo, gettimeofday, gmtime_r, inet_ntoa, memset, socket, strftime], [], [
if test "$(eval echo \$"$(eval 'echo ac_cv_func_${as_decl_name}')")" = "yes"
then
echo " note: earlier check for $(eval 'echo ${as_decl_name}') superseded."
eval "$(eval 'echo ac_cv_func_${as_decl_name}=no')"
_mask_varname=HAVE_`eval "echo '${as_decl_name}'" | tr 'a-z' 'A-Z'`
echo "g/#define $_mask_varname 1/s//\/* #undef $_mask_varname *\//
wq
." | ed -s confdefs.h
fi
], [[
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
]])
AC_PROG_INSTALL
AC_TYPE_SIZE_T
AC_TYPE_UINT8_T
@ -2163,7 +2198,9 @@ fi
if test "$ENABLED_STACKSIZE" = "yes"
then
AC_CHECK_FUNC([posix_memalign], [], [AC_MSG_ERROR(stacksize needs posix_memalign)])
AC_CHECK_DECL([posix_memalign], [], [AC_MSG_ERROR(stacksize needs posix_memalign)])
AC_CHECK_FUNC([pthread_attr_setstack], [], AC_CHECK_LIB([pthread],[pthread_attr_setstack]))
AC_CHECK_DECL([pthread_attr_setstack], [], [AC_MSG_ERROR(stacksize needs pthread_attr_setstack)], [[#include <pthread.h>]])
AM_CFLAGS="$AM_CFLAGS -DHAVE_STACK_SIZE"
fi