Re: [Bug-apl] errors building gnu-apl 1.7

[Dr . Jürgen Sauermann]

Hi Jeff, the warning regarding -Wconstant-logical-operand is bogus. I have nevertheless updated the sources; the line now reads: ostream * log = (LOG_startup != 0 || LOG_Svar_DB_signals != 0) ? & cerr : 0; You can either fix that line manually, or update to the latest SVN version 1138 where the line is corrected. The sirst two warnings (-Wnull-dereference) are a little obscure since the indicated line numbers in ScalarFunction.cc do not show anything close to the printout of the error. This could have two reasons: A. you compile a rather old version of GNU APL (for examle the one stored on the GNU mirrors). In that case I would recommend to fetch the GNU APL code from our SVN repository at savannah (see https://savannah.gnu.org/svn/?group=apl with an empty modulename). B. your compiler expands some macros somewhere and displays the expaneded text while loosing track of the source code lines. In that case I would disable this particular warning (reconfigure the sources with something like: CXXFLAGS = -Wnonull-dereference ./configure ). I believe these 2 warning are also not significant. Best Regards, Jürgen On 4/24/19 5:01 PM, Jeff Derby wrote: this was on a Mac running macOS 10.14.4 using Apple's command line tools: ----------------- l-Svar_record.o `test -f 'Svar_record.cc' || echo './'`Svar_record.cc ScalarFunction.cc:97:14: error: binding dereferenced null pointer to reference has undefined behavior [-Werror,-Wnull-dereference]    : value_Z(*(Value *)0),              ^~~~~~~~~~~ ScalarFunction.cc:159:14: error: binding dereferenced null pointer to reference has undefined behavior [-Werror,-Wnull-dereference]    : value_Z(*(Value *)0),              ^~~~~~~~~~~ 2 errors generated. make[3]: *** [apl-ScalarFunction.o] Error 1 make[3]: *** Waiting for unfinished jobs.... Svar_DB.cc:302:30: error: use of logical '||' with constant operand [-Werror,-Wconstant-logical-operand] ostream * log = (LOG_startup || LOG_Svar_DB_signals) ? & cerr : 0;                              ^  ~~~~~~~~~~~~~~~~~~~ Svar_DB.cc:302:30: note: use '|' for a bitwise operation ostream * log = (LOG_startup || LOG_Svar_DB_signals) ? & cerr : 0;                              ^~                              | 1 error generated. make[3]: *** [apl-Svar_DB.o] Error 1 mv -f .deps/apl-StateIndicator.Tpo .deps/apl-StateIndicator.Po mv -f .deps/apl-Svar_record.Tpo .deps/apl-Svar_record.Po make[2]: *** [all-recursive] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2 --------------- should i just turn off treating warnings as errors? thanks Jeff H. Derby IBM Corporation RTP, NC  USA Cell: (919) 672-0962 Internet:  jhde...@us.ibm.com