dont strip libraries - add node.md

.devcontainer/devcontainer.json

@@ -1,7 +1,7 @@
 // For format details, see https://containers.dev/implementors/json_reference/
 {
     "name": "epics-containers IOC devcontainer",
-    "image": "ghcr.io/epics-containers/rtems6-powerpc-linux-developer:main",
+    "image": "ghcr.io/epics-containers/rtems6-powerpc-linux-developer:6.2rc1",
     "remoteEnv": {
         // allows X11 apps to run inside the container
         "DISPLAY": "${localEnv:DISPLAY}",

Dockerfile

@@ -42,7 +42,9 @@ RUN curl https://ftp.rtems.org/pub/rtems/releases/${RTEMS_MAJOR}/rc/${RTEMS_VERS
 
 # build the cross compilation tool suite
 WORKDIR rsb/rtems
-RUN ../source-builder/sb-set-builder --jobs=6 --prefix=${RTEMS_ROOT} ${RTEMS_MAJOR}/rtems-${RTEMS_ARCH}
+RUN ../source-builder/sb-set-builder --prefix=${RTEMS_ROOT} ${RTEMS_MAJOR}/rtems-${RTEMS_ARCH} && \
+    strip $(find ${RTEMS_ROOT}) && \
+
 
 # get the kernel
 WORKDIR ${RTEMS_BASE}
@@ -56,8 +58,7 @@ COPY VMEConfig.patch .
 RUN git apply VMEConfig.patch && \
     ./waf bspdefaults --rtems-bsps=${RTEMS_ARCH}/${RTEMS_BSP} > config.ini && \
     sed -i \
-        -e "s|RTEMS_POSIX_API = False|RTEMS_POSIX_API = True|" \
-        -e "s|BUILD_TESTS = False|BUILD_TESTS = True|" \
+        -e "s|RTEMS_POSIX_API = False|RTEMS_POSIX_API = True|"
         config.ini && \
     ./waf configure --prefix=${RTEMS_ROOT}
 
@@ -77,20 +78,18 @@ RUN git submodule init && \
 
 from environment AS runtime_prep
 
-# to make this container much smaller we take just the BSP and strip it
+# To make this container much smaller we take just the BSP and remove any
+# unecessary files.
+#
 # At present epics-base will not build in github with the developer version
 # because of the 7GB limit on the size GHA filesystem. Therefore this 'runtime'
 # container is used there.
+#
+# Note: stripping the rtems libraries causes final executable link failure.
 
 COPY --from=developer ${RTEMS_ROOT} ${RTEMS_ROOT}
 
-RUN apt-get update -y && apt-get upgrade -y && \
-    apt-get install -y --no-install-recommends \
-    binutils \
-    && rm -rf /var/lib/apt/lists/*
-
-RUN powerpc-rtems6-strip $(find ${RTEMS_ROOT}) 2>/dev/null || true
-RUN strip $(find ${RTEMS_ROOT}) 2>/dev/null || true
+RUN echo 'will remove any redundant files here'
 
 from environment AS runtime
 

notes.md

@@ -0,0 +1,40 @@
+# Notes on reducing the size of the beatnik BSP
+
+Motivation: keep the containers small.
+
+1. we can strip all of the x86 binaries with strip from binutils
+1. we cannot strip the powerpc libraries because this makes final link fail
+1. can we strip any powerpc binaries? how do I find them?
+1. gcc builds for a range of powerpc variants - getting rid of all but m7400 will be a massive help.
+
+## patching gcc build in the RS
+
+- the bset file that refers to which gcc gets built is
+  - `rtems/config/6/rtems-default.bset`(default tools built for rtems)
+  - from
+  - `rtems/config/6/rtems-powerpc.bset` (settings for ppc arch)
+- The gcc config for this is
+  - `rtems/config/tools/rtems-gcc-13.2-newlib-head.cfg`
+- The tar file it gets is
+  - `https://ftp.rtems.org/pub/rtems/releases/6/rc/6.1-rc2/sources/gcc-13.2.0.tar.xz`
+- Which ends up in
+  - `sources/gcc-13.2.0.tar.xz`
+
+It looks like we need to add something like this:
+```
+%patch add gcc %{rtems_gcc_patches}/gcc-core-4.4.7-rtems4.10-20120314.diff
+%hash md5 gcc-core-4.4.7-rtems4.10-20120314.diff 084c9085c255b1f6a9204e239dde0579
+```
+to `rtems-gcc-13.2-newlib-head.cfg` in order to patch the gcc build.
+
+Note the value of %{rtems_gcc_pathces} gets set here:
+- `rtems/config/rtems-urls.bset`
+
+See https://docs.rtems.org/branches/master/user/rsb/project-sets.html#patches.
+
+## working out what needs patching
+
+The above tar file is expanded into
+- `rtems/build/powerpc-rtems6-gcc-13.2.0-newlib-3cacedb-x86_64-linux-gnu-1`
+
+So just need to look through that and work out a patch! :-O