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build: Add menuselect options to facilitate code tracing and coverage

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The following options have been added to the menuselect "Compiler Flags"
section...

CODE_COVERAGE: The ability to enable code coverage via the `--enable-coverage`
configure flag has existed for many years but changing it requires
re-running ./configure which is painfully slow.  With this commit, you can
now enable and disable it via menuselect. Setting this option adds the
`-ftest-coverage` and `-fprofile-arcs` flags on the gcc and ld command lines.
It also sets DONT_OPTIMIZE. Note: If you use the `--enable-coverage` configure
flag, you can't turn it off via menuselect so choose one method and stick to
it.

KEEP_FRAME_POINTERS: This option sets `-fno-omit-frame-pointers` on the gcc
command line which can facilitate debugging with 'gdb' and tracing with 'perf'.
Unlike CODE_COVERAGE, this option doesn't depend on optimization being
disabled.  It does however conflict with COMPILE_DOUBLE.
This commit is contained in:
George Joseph
2025-10-30 06:55:49 -06:00
committed by github-actions[bot]
parent 27fb039839
commit a9a1b976a7
2 changed files with 19 additions and 4 deletions
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12
Makefile.rules
View File

@@ -82,17 +82,21 @@ ifeq ($(CC),gcc)
endif
endif
ifeq ($(findstring DONT_OPTIMIZE,$(MENUSELECT_CFLAGS))$(AST_CODE_COVERAGE),no)
ifeq ($(findstring DONT_OPTIMIZE,$(MENUSELECT_CFLAGS))$(findstring CODE_COVERAGE,$(MENUSELECT_CFLAGS))$(findstring CODE_PROFILE,$(MENUSELECT_CFLAGS))$(AST_CODE_COVERAGE),no)
_ASTCFLAGS+=$(OPTIMIZE)
else
_ASTCFLAGS+=-O0
endif
ifeq ($(AST_CODE_COVERAGE),yes)
ifeq ($(findstring CODE_COVERAGE,$(MENUSELECT_CFLAGS))$(AST_CODE_COVERAGE),no)
_ASTCFLAGS_COVERAGE=
else
_ASTCFLAGS_COVERAGE=-ftest-coverage -fprofile-arcs
_ASTLDFLAGS+=-ftest-coverage -fprofile-arcs
else
_ASTCFLAGS_COVERAGE=
endif
ifneq ($(findstring KEEP_FRAME_POINTERS,$(MENUSELECT_CFLAGS)),)
_ASTCFLAGS+=-fno-omit-frame-pointer
endif
ifeq ($(findstring $(CONFIG_CFLAGS),$(_ASTCFLAGS)),)

11
build_tools/cflags.xml
View File

@@ -5,6 +5,8 @@
</member>
<member name="COMPILE_DOUBLE" displayname="Pre-compile with optimizations to detect errors, then discard and recompile with DONT_OPTIMIZE. Creates intermediate .i files">
<depend>DONT_OPTIMIZE</depend>
<conflict>KEEP_FRAME_POINTERS</conflict>
<conflict>CODE_COVERAGE</conflict>
<support_level>core</support_level>
</member>
<member name="DEBUG_THREADS" displayname="Enable Thread Debugging">
@@ -132,4 +134,13 @@
<support_level>core</support_level>
<defaultenabled>no</defaultenabled>
</member>
<member name="KEEP_FRAME_POINTERS" displayname="Set -fno-omit-frame-pointers to Facilitate Debugging and Tracing with 'perf'">
<conflict>COMPILE_DOUBLE</conflict>
<support_level>core</support_level>
</member>
<member name="CODE_COVERAGE" displayname="Set -ftest-coverage -fprofile-arcs to Enable gcov Code Coverage">
<support_level>extended</support_level>
<depend>DONT_OPTIMIZE</depend>
</member>
</category>