On Fri, 1 Feb 2019 at 14:49, Sebastian Huber < sebastian.hu...@embedded-brains.de> wrote:
> On 01/02/2019 10:06, Vijay Kumar Banerjee wrote: > > > > On Fri, 1 Feb 2019 at 12:13, Sebastian Huber > > <sebastian.hu...@embedded-brains.de > > <mailto:sebastian.hu...@embedded-brains.de>> wrote: > > > > Hello, > > > > how can I check if a function exists in waf (similar to > > AC_CHECK_FUNC)? > > Currently, we get this output from the RTEMS tools waf configure > > (please > > note the "Invalid argument 'function_name' in test"): > > > > Hi, > > > > The support for 'function_name' has been removed since waf 2 as it > > was broken ( see > > https://gitlab.com/ita1024/waf/blob/master/waflib/Tools/c_config.py#L420 > ) > > Nice. > > > > > I guess the best option is to just use 'header_name' or to use the > > 'fragment' parameter to write a fragment that calls the desired function. > > So, there is no standard compile and link test for functions? If I use this > > conf.check_cc(fragment = 'int main(void) { strnlen("", 0); return > 0; }', > header_name="string.h", features = 'c', mandatory = > False) > > waf outputs > > Checking for header string.h : yes > > I don't want to test for string.h, I want to test for strnlen(). In > config.log we have: > > You can use the msg param like this ... ============ diff --git a/rtemstoolkit/wscript b/rtemstoolkit/wscript index 2c126c8..105869f 100644 --- a/rtemstoolkit/wscript +++ b/rtemstoolkit/wscript @@ -374,6 +374,12 @@ def conf_libiberty(conf): conf.check(header_name='process.h', features = 'c', mandatory = False) conf.check(header_name='stdlib.h', features = 'c') conf.check(header_name='string.h', features = 'c') + conf.check_cc( fragment = ''' + #include <string.h> + int main(void) { strnlen("", 0); return 0; } + ''', + features = 'c', + msg = 'Checking for function strnlen') conf.check(header_name='strings.h', features = 'c', mandatory = False) conf.check(header_name='sys/file.h', features = 'c', mandatory = False) conf.check(header_name='sys/stat.h', features = 'c', mandatory = False) ============ This gives an output Checking for function strnlen : yes --------------------------------------------- > Checking for header string.h > ==> > int main(void) { strnlen("", 0); return 0; } > <== > [1/1] Compiling > [32mbuild/.conf_check_6da1e91772980301eb2528a1d150a7ab/test.c [0m > > ['/usr/bin/gcc', '../test.c', '-c', > > '-o/scratch/git-rtems-tools/build/.conf_check_6da1e91772980301eb2528a1d150a7ab/testbuild/test.c.1.o'] > err: ../test.c: In function ‘main’: > ../test.c:1:18: warning: implicit declaration of function ‘strnlen’ > [-Wimplicit-function-declaration] > int main(void) { strnlen("", 0); return 0; } > ^~~~~~~ > > yes > --------------------------------------------- > > So, this test uses already quite some code and still is basically useless. > > -- > Sebastian Huber, embedded brains GmbH > > Address : Dornierstr. 4, D-82178 Puchheim, Germany > Phone : +49 89 189 47 41-16 > Fax : +49 89 189 47 41-09 > E-Mail : sebastian.hu...@embedded-brains.de > PGP : Public key available on request. > > Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG. > >
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