OS400 compile failures when including QADRT and link fail trying to export deprecated routines

[jonrumsey]

I did this

Compile and link libCurl 7.78.0 on OS400 V7R4M0 (with or without GSKit)

CZM1002:  cfilters.c.819, 84.32: CZM0215(20) Too many arguments specified for macro close.
CZM1003:  cfilters.c.819, 84.18: CZM0022(30) "close_a" is not a member of "const struct Curl_cftype".
CZM1002:  cfilters.c.819, 156.22: CZM0215(20) Too many arguments specified for macro close.
CZM1003:  cfilters.c.819, 156.14: CZM0022(30) "close_a" is not a member of "const struct Curl_cftype".
CZS0601:  Module CFILTERS is not created because statement errors occurred.
CZM0613:  The compilation failed.

CZM1002:  socks.c.819, 1199.32: CZM0215(20) Too many arguments specified for macro close.
CZM1003:  socks.c.819, 1199.18: CZM0022(30) "close_a" is not a member of "const struct Curl_cftype".
CZS0601:  Module SOCKS is not created because statement errors occurred.
CZM0613:  The compilation failed.

CZM1002:  vtls/vtls.c.819, 1192.21: CZM0215(20) Too many arguments specified for macro close.
CZM1003:  vtls/vtls.c.819, 1192.13: CZM0022(30) "close_a" is not a member of "const struct Curl_ssl".
CZM1002:  vtls/vtls.c.819, 1445.23: CZM0215(20) Too many arguments specified for macro close.
CZM1003:  vtls/vtls.c.819, 1445.15: CZM0022(30) "close_a" is not a member of "const struct Curl_ssl".
CZM1002:  vtls/vtls.c.819, 1495.32: CZM0215(20) Too many arguments specified for macro close.
CZM1003:  vtls/vtls.c.819, 1495.18: CZM0022(30) "close_a" is not a member of "const struct Curl_cftype".
CZS0601:  Module VTLS is not created because statement errors occurred.
CZM0613:  The compilation failed.

These compile errors are because there is now a function pointer called close which takes two arguments and the preprocessor macro expansion can't distinguish... by default including the ASCII runtime header unistd.h
#define close(a) as close_a(a)

This can be avoided by defining 'qadrt_use_inline' which avoids the define and instead inlines the redirection.

There is also a link error where the list of exported routines is generated by scraping the header files for routines that are declared as CURL_EXTERN but routines qualified with CURL_DEPRECATED(...) now fail to be correctly identified by the regex matching in the sed script.

I expected the following

Clean build

curl/libcurl version

libCurl 7.78.0

operating system

OS400 V7R4M0