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configure: Check for getprotobyname(3), libnss at configure; minor cleanup.

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This commit is contained in:
Jason Volk 2020-03-08 15:16:02 -07:00
parent 133b3a5611
commit a29ec982fd
1 changed files with 31 additions and 0 deletions
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31
configure.ac
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@ -837,6 +837,8 @@ dnl -fsigned-char ensures 'char' is signed on all platforms
CFLAGS+=" -fsigned-char"
CXXFLAGS+=" -fsigned-char"
dnl ***************************************************************************
dnl
dnl Header files
dnl
@ -972,6 +974,8 @@ RB_CHK_SYSHEADER(experimental/string_view, [EXPERIMENTAL_STRING_VIEW])
RB_CHK_SYSHEADER(experimental/optional, [EXPERIMENTAL_OPTIONAL])
RB_CHK_SYSHEADER(experimental/memory_resource, [EXPERIMENTAL_MEMORY_RESOURCE])
dnl ***************************************************************************
dnl
dnl Specific function checks
dnl
@ -998,6 +1002,10 @@ dnl
dnl Networking Functions
dnl
dnl
dnl ip6
dnl
AC_ARG_ENABLE(ipv6, AC_HELP_STRING([--disable-ipv6], [Disable IPv6 support]),
[
ipv6="no"
@ -1012,6 +1020,29 @@ AM_COND_IF(HAVE_IPV6,
AC_DEFINE([HAVE_IPV6], [1], [IPv6 is supported])
],[])
dnl
dnl netdb / libnss_db
dnl
AC_CHECK_FUNCS([ \
endprotoent \
getprotobyname \
getprotobyname_r \
setprotoent \
])
dnl Even if getprotobyname(3) is found linux tries to open nss_db at runtime and
dnl that surprises our user with trouble. The check catches it here FWIW.
AM_COND_IF(LINUX,
[
AC_CHECK_LIB([nss_db], [_nss_db_getprotobyname_r],
[
AC_DEFINE(HAVE_LIBNSS_DB, 1, [Define if you have libnss_db])
], [
AC_MSG_WARN([Missing libnss_db.so for getprotobyname(3) impl. Try apt-get install libnss-db])
])
])
dnl ***************************************************************************
dnl