m4 porting to z/OS - gnulib fix - obstack.h

[Harithamma D]

Hi Team,

 

I am porting m4 to z/OS and came across following compilation error related to gnulib:

 

In file included from ./builtin.c:25:

In file included from ./m4.h:50:

../lib/obstack.h:229:8: error: unknown attribute '_Noreturn' ignored [-Werror,-Wunknown-attributes]

extern __attribute_noreturn__ void (*obstack_alloc_failed_handler) (void);

       ^

../lib/obstack.h:156:50: note: expanded from macro '__attribute_noreturn__'

#  define __attribute_noreturn__ __attribute__ ((__noreturn__))

                                                 ^

/usr/include/le/features.h:791:26: note: expanded from macro '__noreturn__'

    #define __noreturn__ _Noreturn

 

 

The compile command used is:

 

source='builtin.c' object='builtin.o' libtool=no \

DEPDIR=.deps depmode=hp2 /bin/sh ../build-aux/depcomp \

xlclang    -I../lib -I../lib -DNSIG=42 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE -D_OPEN_SYS_FILE_EXT=1 -D_AE_BIMODAL=1 -D_ENHANCED_ASCII_EXT=0xFFFFFFFF  -fanalyzer -fno-common -Wall -Wbad-function-cast -Wdate-time -Wdisabled-optimization -Wdouble-promotion -Wextra -Winit-self -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-include-dirs -Wmissing-prototypes -Wnested-externs -Wnull-dereference -Wold-style-definition -Woverlength-strings -Wpacked -Wpointer-arith -Wshadow -Wstack-protector -Wstrict-overflow -Wstrict-prototypes -Wuninitialized -Wunknown-pragmas -Wvariadic-macros -Wwrite-strings -Wformat=2 -Wno-missing-field-initializers -Werror -qascii -std=gnu11 -qnocsect -qenum=int -qgonumber -O3 -std=c11 -fgnu89-inline -I/home/haritha/code/m4port/m4/lib -I/home/haritha/code/m4port/patches/PR1/include -c -o builtin.o builtin.c

 

The above error got fixed when I added the ! defined (__MVS__) condition as shown in diff file attached.

I would like to upstream these changes. Please let me know if you have any concerns or questions.

 

Regards

Haritha

 

 

obstack.h.patch
Description: obstack.h.patch