7eda11c87c
During an exp-run for llvm 15 (see bug 265425), it turned out that
astro/cfitsio failed to build with clang 15:
drvrnet.c:3887:23: warning: call to undeclared function 'gethostbyname'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
hostent = gethostbyname(localhost);
^
drvrnet.c:3887:21: error: incompatible integer to pointer conversion assigning to 'struct hostent *' from 'int' [-Wint-conversion]
hostent = gethostbyname(localhost);
^ ~~~~~~~~~~~~~~~~~~~~~~~~
1 warning and 1 error generated.
This is because the configure script defines _XOPEN_SOURCE=700, for
unclear reasons, and this hides the gethostbyname() declaration in
/usr/include/netdb.h. Fix it by removing the line that adds the define.
PR: 268302
Approved by: portmgr (tcberner)
MFH: 2022Q4
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