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From:	Lee <ler762 AT gmail DOT com>
Date:	Wed, 30 Nov 2016 09:49:35 -0500
Message-ID:	<CAD8GWsuytE300SCrqtmpOFqW92za1rftYBdWmyN1nDexyWMmFw@mail.gmail.com>
Subject:	Re: Cygwin TCP slow
To:	Brian DOT Inglis AT systematicsw DOT ab DOT ca, cygwin AT cygwin DOT com
X-IsSubscribed:	yes

> If you also provided a Cygwin port of iperf3

Any hints on how to do that?

Trying to build using the i686-w64-mingw32-gcc cross-compiler dies
because nanosleep is missing.  How to figure out what needs to be
installed to get that function?

$ ./configure --prefix=/usr/local  --build=i686-pc-cygwin
--host=i686-w64-mingw32
  <.. snip ..>
checking for ANSI C header files... (cached) yes
checking for library containing floor... none required
checking for library containing nanosleep... no
nanosleep() required for timing operations.

/source/iperf-3.1.4
$



Trying to build using the cygwin gcc compiler does because of
"conflicting types for 'iprintf'"

aside: Why would one redefine a standard routine instead of making
their own routine that calls the standard routine??  The conflicting
bit is in iperf_api.h:
/* Custom printf routine. */
int iprintf(struct iperf_test *test, const char *format, ...)
__attribute__ ((format(printf,2,3)));

In any case, how does one reconcile
  int iprintf( ...
with
  int	_EXFUN(iprintf, ( ...


$ ./configure --prefix=/usr/local
$ make
Making all in src
make[1]: Entering directory '/source/iperf-3.1.4/src'
make  all-am
make[2]: Entering directory '/source/iperf-3.1.4/src'
/bin/sh ../libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I.
   -g -O2 -Wall -MT cjson.lo -MD -MP -MF .deps/cjson.Tpo -c -o
cjson.lo cjson.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -g -O2 -Wall -MT cjson.lo
-MD -MP -MF .deps/cjson.Tpo -c cjson.c  -DDLL_EXPORT -DPIC -o
.libs/cjson.o
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -g -O2 -Wall -MT cjson.lo
-MD -MP -MF .deps/cjson.Tpo -c cjson.c -o cjson.o >/dev/null 2>&1
mv -f .deps/cjson.Tpo .deps/cjson.Plo
/bin/sh ../libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I.
   -g -O2 -Wall -MT iperf_api.lo -MD -MP -MF .deps/iperf_api.Tpo -c -o
iperf_api.lo iperf_api.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -g -O2 -Wall -MT
iperf_api.lo -MD -MP -MF .deps/iperf_api.Tpo -c iperf_api.c
-DDLL_EXPORT -DPIC -o .libs/iperf_api.o
In file included from iperf_api.c:66:0:
iperf_api.h:262:5: error: conflicting types for 'iprintf'
 int iprintf(struct iperf_test *test, const char *format, ...)
__attribute__ ((format(printf,2,3)));
     ^
In file included from /usr/include/stdio.h:29:0,
                 from iperf_api.c:32:
/usr/include/stdio.h:298:5: note: previous declaration of 'iprintf' was here
 int _EXFUN(iprintf, (const char *, ...)
     ^
iperf_api.c:3113:1: error: conflicting types for 'iprintf'
 iprintf(struct iperf_test *test, const char* format, ...)
 ^
In file included from /usr/include/stdio.h:29:0,
                 from iperf_api.c:32:
/usr/include/stdio.h:298:5: note: previous declaration of 'iprintf' was here
 int _EXFUN(iprintf, (const char *, ...)
     ^
make[2]: *** [Makefile:856: iperf_api.lo] Error 1
make[2]: Leaving directory '/source/iperf-3.1.4/src'
make[1]: *** [Makefile:632: all] Error 2
make[1]: Leaving directory '/source/iperf-3.1.4/src'
make: *** [Makefile:381: all-recursive] Error 1

/source/iperf-3.1.4
$

TIA,
Lee

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