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<p><tt>Thanks Kristian,</tt></p>
<p><tt>On Solaris, NAN is not available with C89. Is there an issue
to build proj 5 forcing C99 by replacing -std=c89 to -std=c99 in
the Makefile, after configure ?</tt></p>
<p><tt><br>
</tt></p>
<p><tt>Regards.<br>
</tt></p>
<br>
<div class="moz-cite-prefix">Le 21/08/2019 à 12:43, Kristian Evers a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:73C2B9B9-D0AC-41C0-9E3D-092EABBE28C4@sdfe.dk">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
Eric,
<div class=""><br class="">
</div>
<div class="">A C++11 compatible compiler is only required for
PROJ 6 and onwards. This was introduced with RFC3 [0]. Previous
versions was strictly C89, hence the enforcement of that
standard in PROJ 5.2.0.</div>
<div class=""><br class="">
</div>
<div class="">/Kristian</div>
<div class=""><br class="">
</div>
<div class="">[0] <a
href="https://proj.org/community/rfc/rfc-3.html" class=""
moz-do-not-send="true">https://proj.org/community/rfc/rfc-3.html</a><br
class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On 16 Aug 2019, at 14:57, Dechaux Eric CEN
(BCQ STIG) <<a
href="mailto:eric.dechaux@gendarmerie.interieur.gouv.fr"
class="" moz-do-not-send="true">eric.dechaux@gendarmerie.interieur.gouv.fr</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="">Greetings,<br class="">
<br class="">
I have been investigating proj 5.2.0 build failure on
Solaris 11.3 for amd64. At some point the build stops on
error because of the NAN being not declared :<br
class="">
<br class="">
gcc -DHAVE_CONFIG_H -I.
-DPROJ_LIB=\"/appli/stig/11.3-20190816-104632/share/proj\"
-DMUTEX_pthread -D_FORTIFY_SOURCE=2 -I/usr/include/pcre
-I/appli/stig/11.3-20190816-104632/include -Wall
-Wdeclaration-after-statement -Wextra -Winit-self
-Wunused-parameter -Wmissing-prototypes
-Wmissing-declarations -Wformat -Werror=format-security
-Wno-format-nonliteral -Wlogical-op -Wshadow -Werror=vla
-Wdeclaration-after-statement -Wdate-time
-Wfloat-conversion -std=gnu89 -m64 -O2
-fstack-protector-strong -fpic -fPIC
--param=ssp-buffer-size=4
-I/appli/stig/11.3-20190816-104632/include
-DHAVE_C99_MATH=1 -MT proj_strtod.o -MD -MP -MF
.deps/proj_strtod.Tpo -c -o proj_strtod.o proj_strtod.c<br
class="">
gie.c: In function ‘cart_selftest’:<br class="">
gie.c:2008:20: error: ‘NAN’ undeclared (first use in
this function)<br class="">
a = proj_coord(NAN, NAN, NAN, NAN);<br class="">
^<br class="">
gie.c:2008:20: note: each undeclared identifier is
reported only once for each function it appears in<br
class="">
make[2]: *** [gie.o] Erreur 1<br class="">
<br class="">
<br class="">
As the documentation specify a C and C++11 compiler is
required I changed the CFLAGS to include -std=gnu11. The
build and checks run without errror. Solaris 11.3 is
bundled with GCC 5.3 with uses gnu11 by default for C
and there should be no reason to force for it on the
CFLAGS.<br class="">
<br class="">
I noticed the configure script detects and automatically
adds -std=gnu89 to the CFLAGS :<br class="">
<br class="">
checking whether C compiler accepts -Wdocumentation
-Wno-documentation-deprecated-sync... no<br class="">
checking if -std=gnu89 can be enabled... yes<br
class="">
checking whether C++ compiler accepts
-Wunused-private-field... no<br class="">
<br class="">
<br class="">
On Solaris this disables the NAN macro as it is C99:<br
class="">
<br class="">
$ cat test.c<br class="">
#include <stdlib.h><br class="">
#include <math.h><br class="">
<br class="">
int main (void) {<br class="">
<br class="">
float f ;<br class="">
f = NAN ;<br class="">
<br class="">
<br class="">
exit (EXIT_SUCCESS) ;<br class="">
}<br class="">
<br class="">
$ gcc -std=gnu89 test.c<br class="">
test.c: In function ‘main’:<br class="">
test.c:7:6: error: ‘NAN’ undeclared (first use in this
function)<br class="">
f = NAN ;<br class="">
^<br class="">
test.c:7:6: note: each undeclared identifier is reported
only once for each function it appears in<br class="">
<br class="">
$ gcc -std=gnu99 test.c<br class="">
<br class="">
$ gcc -std=gnu11 test.c<br class="">
<br class="">
<br class="">
<br class="">
What is the purpose of forcing C standard to gnu89 ?<br
class="">
<br class="">
<br class="">
<br class="">
Thanks.<br class="">
<br class="">
-- Eric<br class="">
<br class="">
<br class="">
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