[XEN PATCH v4 1/2] automation/eclair: make the docs for MISRA C:2012 Dir 4.1 visible to ECLAIR

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

To be able to check for the existence of the necessary subsections in
the documentation for MISRA C:2012 Dir 4.1, ECLAIR needs to have a source
file that is built.

This file is generated from 'C-runtime-failures.rst' in docs/misra
and the configuration is updated accordingly.

Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
---
Changes from RFC:
- Dropped unused/useless code
- Revised the sed command
- Revised the clean target

Changes in v2:
- Added explanative comment to the makefile
- printf instead of echo

Changes in v3:
- Terminate the generated file with a newline
- Build it with -std=c99, so that the documentation
  for D1.1 applies.
Changes in v5:
- Transform and build the file directly in the eclair-specific directory
---
 automation/eclair_analysis/build.sh   | 21 +++++++++++++++++++--
 automation/eclair_analysis/prepare.sh |  7 ++++---
 2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/automation/eclair_analysis/build.sh 
b/automation/eclair_analysis/build.sh
index ec087dd822fa..f24292ed0643 100755
--- a/automation/eclair_analysis/build.sh
+++ b/automation/eclair_analysis/build.sh
@@ -33,12 +33,29 @@ else
   PROCESSORS=6
 fi
 
+runtime_failures_docs() {
+  doc="C-runtime-failures.rst"
+  builddir="automation/eclair_analysis"
+  
+  cp "docs/misra/${doc}" "${builddir}"
+  cd "${builddir}"
+  printf "/*\n\n" >"${doc}.tmp"
+  sed -e 's|\*/|*//*|g' "${doc}" >>"${doc}.tmp"
+  printf "\n\n*/\n" >>"${doc}.tmp"
+  mv "${doc}.tmp" "${doc}.c"
+  
+  # Cannot redirect to /dev/null because it would be excluded from the analysis
+  "${CROSS_COMPILE}gcc-12" -std=c99 -c "${doc}.c" -o "${doc}.o"
+  cd -
+}
+
 (
-  cd xen
+  runtime_failures_docs
 
   make "-j${PROCESSORS}" "-l${PROCESSORS}.0"    \
        "CROSS_COMPILE=${CROSS_COMPILE}"         \
        "CC=${CROSS_COMPILE}gcc-12"              \
        "CXX=${CROSS_COMPILE}g++-12"             \
-       "XEN_TARGET_ARCH=${XEN_TARGET_ARCH}"
+       "XEN_TARGET_ARCH=${XEN_TARGET_ARCH}"     \
+       -C xen
 )
diff --git a/automation/eclair_analysis/prepare.sh 
b/automation/eclair_analysis/prepare.sh
index 0cac5eba00ae..fe9d16e48ecc 100755
--- a/automation/eclair_analysis/prepare.sh
+++ b/automation/eclair_analysis/prepare.sh
@@ -35,11 +35,12 @@ else
 fi
 
 (
-    cd xen
-    cp "${CONFIG_FILE}" .config
+    ./configure
+    cp "${CONFIG_FILE}" xen/.config
     make clean
     find . -type f -name "*.safparse" -print -delete
-    make -f ${script_dir}/Makefile.prepare prepare
+    cd xen
+    make -f "${script_dir}/Makefile.prepare" prepare
     # Translate the /* SAF-n-safe */ comments into ECLAIR CBTs
     scripts/xen-analysis.py --run-eclair --no-build --no-clean
 )
-- 
2.34.1