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[UDUNITS #OBJ-198091]: udunits 2.2.26 fails to build against clang 12.0.0

Rick,

Alright. That does it. I thought I might be able to get away fixing this 
problem piecemeal but that didn't work. I've modified all the files to 
(hopefully) eliminate this problem once and for all.

    wget ftp://ftp.unidata.ucar.edu/pub/udunits/beta/udunits-2.2.27.19.tar.gz

> % echo $CC $CFLAGS
> clang -fPIC
> % echo $FC $FCFLAGS
> gfortran -fPIC
> 
> % ./configure CFLAGS="-std=c99" > configure.log 2>&1
> %  make V=Y > make.log 2>&1
> [...]
> libtool: compile:  clang -DHAVE_CONFIG_H -I. -I.. -DNDEBUG -std=c99 -MT
> unitAndId.lo -MD -MP -MF .deps/unitAndId.Tpo -c unitAndId.c  -fno-common
> -DPIC -o .libs/unitAndId.o
> unitAndId.c:59:18: error: implicit declaration of function 'strdup' is
> invalid in C99 [-Werror,-Wimplicit-function-declaration]
> entry->id = strdup(id);
> ^
> unitAndId.c:59:18: note: did you mean 'strcmp'?
> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/string.h:77:6:
> note: 'strcmp' declared here
> int      strcmp(const char *__s1, const char *__s2);
> ^
> unitAndId.c:59:16: warning: incompatible integer to pointer conversion
> assigning to 'char *' from 'int' [-Wint-conversion]
> entry->id = strdup(id);
> ^ ~~~~~~~~~~
> 1 warning and 1 error generated.
> make[4]: *** [unitAndId.lo] Error 1
> make[3]: *** [all-recursive] Error 1
> make[2]: *** [all] Error 2
> make[1]: *** [all-recursive] Error 1
> make: *** [all] Error 2
> 
> Logs attached.
> 
> --
> Rick Grubin
> Joint Center for Satellite Data Assimilation
> UCAR Foothills Lab / Building 4
> 3300 Mitchell Lane
> Boulder, CO 80301
> address@hidden


Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: OBJ-198091
Department: Support UDUNITS
Priority: Normal
Status: Closed
===================
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