ca-gateway doesn't compile on macOS mojave

[vodellv]

I get the following error message:
mac-130048:gateway2_0_6_0 odell$ make
/Library/Developer/CommandLineTools/usr/bin/make -C ./configure install
/Library/Developer/CommandLineTools/usr/bin/make -C O.darwin-x86 -f ../Makefile TOP=../..
T_A=darwin-x86 install
perl -CSD /Users/odell/base-3.15.7/bin/darwin-x86/convertRelease.pl checkRelease
/Library/Developer/CommandLineTools/usr/bin/make -C ./src install
/Library/Developer/CommandLineTools/usr/bin/make -C O.darwin-x86 -f ../Makefile TOP=../..
T_A=darwin-x86 install
c++ -DUNIX -Ddarwin -O3 -g -Wall -DSTAT_PVS -DRATE_STATS -DCONTROL_PVS -DCAS_DIAGNOSTICS -DHANDLE_EXCEPTIONS -DUSE_DENYFROM -arch x86_64 -fno-common -I. -I../O.Common -I. -I. -I.. -I../../include/compiler/clang -I../../include/os/Darwin -I../../include -I/Users/odell/base-3.15.7/include/compiler/clang -I/Users/odell/base-3.15.7/include/os/Darwin -I/Users/odell/base-3.15.7/include -I/Users/odell/base-3.15.7/src/cas/generic -I/Users/odell/base-3.15.7/src/ca/legacy/pcas/generic -c ../gatePv.cc
In file included from ../gatePv.cc:71:
../gateAs.h:138:27: error: field has incomplete type 'struct re_pattern_buffer'
struct re_pattern_buffer pat_buff;
^
../gateAs.h:138:9: note: forward declaration of 're_pattern_buffer'
struct re_pattern_buffer pat_buff;
^
../gateAs.h:139:22: error: field has incomplete type 'struct re_registers'
struct re_registers regs;
^
../gateAs.h:139:9: note: forward declaration of 're_registers'
struct re_registers regs;
^
2 errors generated.
make[2]: *** [gatePv.o] Error 1
make[1]: *** [install.darwin-x86] Error 2
make: *** [src.install] Error 2
mac-130048:gateway2_0_6_0 odell$

I get the same error message with more recent versions of ca-gateway as well. I'm using EPICS 3.15.7.
This version of gateway compiles fine on the beagle bone. Is there an obvious fix for this?

[ralphlange]

This seems related to the Regular Expression library.

[vodellv]

great! Is there an obvious fix I can make? I'm at a loss as to what to do... what is the Regular Expression library?

[ralphlange]

Had I ever used a Mac in my life... I might even know.
Sorry. Maybe ask on tech-talk. There are always a dozen or two Mac users reading.

[vodellv]

ok, where is tech-talk?

[ralphlange]

https://epics.anl.gov/tech-talk/index.php

[anjohnson]

Evidently Apple's version of regex.h doesn't have the same definitions in it that glibc's does on Linux. Switching to the gateway to build against PCRE worked for me on Mojave.

[ralphlange]

Ok. When time permits, I will

• document this in the README
• add a MacOS job on Travis.