Changes necessary to compile the pyDevSup module for RHEL8 and EPICS 7.0.7

README.module

@@ -8,26 +8,28 @@ require does not know about python and its modules at all.
 
 The good news is that it can be made to work but requires a few manual steps.
 
-1) Build the pyDevSup extension in the normal EPICS way.
+1) Build the pyDevSup extension in the normal EPICS way in the master branch.
 
 2) This generates a pythonXX/$(EPICS_ARCH)/devsup directory. Copy this directory to
    a safe place.
 
-3) Build the module using the GNUMakefile as normal and install it
+3) Switch to the module branch and Build the module using the GNUMakefile as 
+   normal and install it
 
 4) Copy the saved devsup directory in some place into pyDevSup's module hierarchy. 
-   For example: /ioc/modules/pyDevSup/koennecke/R3.14.12/lib/devsup
-
-5) Copy the library /ioc/modules/pyDevSup/koennecke/R3.14.12/lib/${EPICS_HOST_ARCH}/libDevSup.so to 
-   /ioc/modules/pyDevSup/koennecke/R3.14.12/lib/devsup/_dbapi.so
+   For example: /ioc/modules/pyDevSup/1.2.sinq/R7.0.7/lib/RHEL8-x86_64/devsup
 
 6) In order to successfuly load pyDevSup with require the directory underneath where ypu placed 
    pydevsup needs to be on the python path. For example:
-   /ioc/modules/pyDevSup/koennecke/R3.14.12/lib/
-
-With this, one can at least run the testmodule.cmd script and it workd at least 
-for me.
+   /ioc/modules/pyDevSup/1.2.sinq/R7.0.7/lib/RHEL8-x86_64
 
 Please use the module branch, I had to hack the initialisation of pyDevSup to make 
 it work as a module. 
 
+For RHEL8, I had to remove a few static statements in dbdSet.c in order to solve a missing 
+symbols problem. I also had to modify the files in configure somewhat in order to point to 
+the proper python version and to suppress the many cross compilations attempted by the default 
+build. 
+
+
+

configure/CONFIG_PY

@@ -23,11 +23,11 @@ PROD_DEPLIB_DIRS += $(PY_LIBDIRS)
 
 INCLUDES += $(PY_INCDIRS:%=-I%)
 
-ifeq ($(HAVE_NUMPY),YES)
+#ifeq ($(HAVE_NUMPY),YES)
 TARGET_CPPFLAGS += -DHAVE_NUMPY
-else
-$(error numpy required)
-endif
+#else
+#$(error numpy required)
+#endif
 
 #LIB_SYS_LIBS += python$(PY_LD_VER)
 #PROD_SYS_LIBS += python$(PY_LD_VER)

configure/CONFIG_SITE

@@ -19,7 +19,7 @@ CHECK_RELEASE = YES
 # Set this when you only want to compile this application
 #   for a subset of the cross-compiled target architectures
 #   that Base is built for.
-#CROSS_COMPILER_TARGET_ARCHS = vxWorks-68040
+CROSS_COMPILER_TARGET_ARCHS = RHEL8-x86_64
 
 # To install files into a location other than $(TOP) define
 #   INSTALL_LOCATION here.
@@ -33,7 +33,7 @@ CHECK_RELEASE = YES
 #IOCS_APPL_TOP = </IOC/path/to/application/top>
 
 # Default python version.
-PY_VER=2.7
+PY_VER=3.6.8
 
 # Module will be build against this version of the
 # Python interpreter

configure/RELEASE

@@ -36,7 +36,7 @@ TEMPLATE_TOP=$(EPICS_BASE)/templates/makeBaseApp/top
 ## Required Modules ##
 
 # EPICS_BASE usually appears last so other apps can override stuff:
-#EPICS_BASE=/usr/lib/epics
+EPICS_BASE=/usr/local/epics/base-7.0.7
 
 -include $(TOP)/configure/RELEASE.local
 -include $(TOP)/../RELEASE.local

devsupApp/src/dbdset.c

@@ -373,15 +373,15 @@ typedef struct {
     DEVSUPFUN linconv;
 } dset6;
 
-static dset6 pydevsupComSpec = {{6, (DEVSUPFUN)&report, (DEVSUPFUN)&init,
+dset6 pydevsupComSpec = {{6, (DEVSUPFUN)&report, (DEVSUPFUN)&init,
                              (DEVSUPFUN)&init_record,
                              (DEVSUPFUN)&get_iointr_info},
                             (DEVSUPFUN)&process_record};
-static dset6 pydevsupComOut = {{6, (DEVSUPFUN)&report, (DEVSUPFUN)&init,
+dset6 pydevsupComOut = {{6, (DEVSUPFUN)&report, (DEVSUPFUN)&init,
                                 (DEVSUPFUN)&init_record2,
                                 (DEVSUPFUN)&get_iointr_info},
                                (DEVSUPFUN)&process_record};
-static dset6 pydevsupComIn = {{6, (DEVSUPFUN)&report, (DEVSUPFUN)&init,
+dset6 pydevsupComIn = {{6, (DEVSUPFUN)&report, (DEVSUPFUN)&init,
                                 (DEVSUPFUN)&init_record,
                                 (DEVSUPFUN)&get_iointr_info},
                                (DEVSUPFUN)&process_record2};