Re: base fails to build - exception problem

[Riccardo Mottola]

Hi Richard,


Richard Frith-Macdonald wrote:
> To get that error, HAVE_UNEXPECTED must be defined but the symbol must be 
> missing.
> 
> That could either be some problem with configure.ac (so you could look in 
> config.log)
> or it could be an issue with using a different compiler/runtime at configure 
> time and build time.
> 
> The things to look at are the compiler selected and the flags controlling 
> which runtime is used during configuration and build.

I select the compiler when configuring and building gnustep-mape with
these variables:


During the base configure, I see:
checking for objc_setUncaughtExceptionHandler() in runtime... no
checking for objc_set_unexpected() in runtime... no
checking for _objc_unexpected_exception in runtime... yes
checking whether to enable native Objective-C exceptions... yes

yet, I get this:
NSException.m:818:3: error: '_objc_unexpected_exception' undeclared
(first use in this function)
   _objc_unexpected_exception = callUncaughtHandler;
   ^
NSException.m:818:3: note: each undeclared identifier is reported only

When doing the configure check:
configure:8122: gcc5 -o conftest -g -O2  -I/Local/Library/Headers
-I/Local/Library/Headers -I/System/Library/Headers -I/usr/local/include
 -fgnu-runtime -x objective-c  -L/Local/Library/Libraries
-L/Local/Library/Libraries -L/System/Library/Libraries -L/usr/local/lib
conftest.c -lrt  -lpthread -rdynamic -Wl,-rpath=/usr/local/lib/gcc5
-shared-libgcc -pthread -fexceptions -fgnu-runtime
-L/home/multix/GNUstep/Library/Libraries -L/Local/Library/Libraries
-L/System/Library/Libraries -L/usr/local/lib -lobjc -lm     >&5


When building NSException, teh build command line is:
gcc5 NSException.m -c \
      -MMD -MP -DGNUSTEP_TARGET_DIR=\".\" -DGNUSTEP_TARGET_CPU=\"ix86\"
-DGNUSTEP_TARGET_OS=\"freebsd\" -DGNUSTEP_IS_FLATTENED=\"yes\"
-DLIBRARY_COMBO=\"gnu-gnu-gnu\" -DGNUSTEP_BASE_INTERNAL=1 -Wall
-Wdeclaration-after-statement -Wcast-align -DGNUSTEP
-DGNUSTEP_BASE_LIBRARY=1 -DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1
-DGNUSTEP_BASE_LIBRARY=1 -fno-strict-aliasing -fexceptions
-fobjc-exceptions -D_NATIVE_OBJC_EXCEPTIONS -pthread -fPIC -Wall
-DGSWARN -DGSDIAGNOSE -Wno-import -g -O2 -fgnu-runtime -fgnu-runtime
-fconstant-string-class=NSConstantString -I../Headers -I./. -I.
-I/home/multix/GNUstep/Library/Headers -I/Local/Library/Headers
-I/System/Library/Headers -I/usr/local/include -I/Local/Library/Headers
-I/Local/Library/Headers -I/System/Library/Headers
-I/usr/local/lib/libffi-3.2.1/include -I/usr/local/include/libxml2
-I/usr/local/include -I/usr/local/include -I/usr/local/include/p11-kit-1 \
       -o obj/libgnustep-base.obj/NSException.m.o

The only difference I spot is that one has:
-fexceptions -fgnu-runtime

the other one has:
-fexceptions -fobjc-exceptions -fgnu-runtime -fgnu-runtime

could the added -fobjc-exception cause the issue?

It is also inelegant that we add certain flags twice apparently, but
should cause no harm.

Riccardo