GCC RiscV compiler not supported

SonarQube Cloud
1

Hello,
we tried to setup Sonar and try the Sonar Scanner tool to work with compile_commands.json generated by our project, but it doesn’t recognize our compiler. It is the GCC compiler for RiscV platform (shipped with the Zephyr SDK by default).

The sonar-scanner command fails with multiple errors (for each source file) such as:

14:00:32.273 WARN Provided compiler is not compatible.
Invalid probe found, skip analysis of files: [/home/xx/xx/xx/xx/src/main.c]
The compiler probe ‘stdout’ is expected to contain at least one’#define’ directive:

Then the tool eventually fails with:

14:00:32.767 INFO  Detected compilers: riscv64-zephyr-elf-gcc=174
14:00:32.769 INFO  Number of compilation units in the provided Compilation Database: 174
14:00:32.771 INFO  Number of skipped unsupported compilation units: 174
14:00:32.777 INFO  Number of skipped non-indexed compilation units: 0
14:00:32.777 INFO  Number of skipped duplicate compilation units: 0
14:00:32.778 INFO  Number of remaining compilation units to be analyzed: 0
14:00:32.780 INFO  Detected standards: 
14:00:32.787 INFO  236/262 files marked as unchanged
14:00:32.789 INFO  Analysis cache: 0/0 hits, 125 bytes
14:00:32.789 INFO  Incremental symbolic execution cache: 0 hits out of 0 total analyzed targets (hit rate 0%)
14:00:32.848 ERROR Error during SonarScanner Engine execution
java.lang.IllegalStateException: The Compilation Database JSON file was found but 0 C/C++/Objective-C files were analyzed. Please make sure that:
  * you are correctly invoking the scanner with correct configuration
  * your compiler is supported
  * you are providing the path to the correct Compilation Database JSON
  * you are building and analyzing the same source checkout, absolute paths must be identical in build and analysis steps
	at com.sonar.cpp.plugin.CFamilySensor.process(CFamilySensor.java:304)
	at com.sonar.cpp.plugin.CFamilySensor.execute(CFamilySensor.java:199)
	at org.sonar.scanner.sensor.AbstractSensorWrapper.analyse(AbstractSensorWrapper.java:68)
	at org.sonar.scanner.sensor.ModuleSensorsExecutor.execute(ModuleSensorsExecutor.java:75)
	at org.sonar.scanner.sensor.ModuleSensorsExecutor.execute(ModuleSensorsExecutor.java:51)
	at org.sonar.scanner.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:64)
	at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:123)
	at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:109)
	at org.sonar.scanner.scan.ProjectScanContainer.scan(ProjectScanContainer.java:211)
	at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:207)
	at org.sonar.scanner.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:170)
	at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:123)
	at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:109)
	at org.sonar.scanner.bootstrap.ScannerContainer.doAfterStart(ScannerContainer.java:464)
	at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:123)
	at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:109)
	at org.sonar.scanner.bootstrap.GlobalContainer.doAfterStart(GlobalContainer.java:128)
	at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:123)
	at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:109)
	at org.sonar.scanner.bootstrap.ScannerMain.runScannerEngine(ScannerMain.java:143)
	at org.sonar.scanner.bootstrap.ScannerMain.run(ScannerMain.java:58)
	at org.sonar.scanner.bootstrap.ScannerMain.main(ScannerMain.java:42)

14:00:33.379 INFO  EXECUTION FAILURE

Our compile_commands.json contains multiple entries such as (I replaced sensitive data with “xx”)

{
  "directory": "/home/xx/xx/xx/xx",
  "command": "
    /home/xx/zephyr-sdk-0.17.0/riscv64-zephyr-elf/bin/riscv64-zephyr-elf-gcc
    -DKERNEL
    -DK_HEAP_MEM_POOL_SIZE=0
    -DXX_XX_XX
    -DXX_XX_XX
    -DXX_XX_XX
    -DPICOLIBC_MINIMAL_PRINTF_SCANF
    -D__LINUX_ERRNO_EXTENSIONS__
    -D__ZEPHYR__=1
    -I/home/xx/xx/xx/xx/xx/src/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx/xx/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx/xx
    -I/home/xx/xx/xx/xx/xx/src/xx
    -I/home/xx/xx/xx/xx/xx/src/xx
    -I/home/xx/xx/xx/xx/xx/src/xx
    -I/home/xx/xx/xx/xx/zephyr/include/generated/zephyr
    -I/home/xx/xx/zephyr/include
    -I/home/xx/xx/xx/xx/zephyr/include/generated
    -I/home/xx/xx/zephyr/soc/common/riscv-privileged/.
    -isystem
    /home/xx/xx/zephyr/lib/libc/common/include
    -fno-strict-aliasing
    -Os
    -imacros
    /home/xx/xx/xx/xx/zephyr/include/generated/zephyr/autoconf.h
    -fno-printf-return-value
    -fno-common
    -g
    -gdwarf-4
    -fdiagnostics-color=always
    -mabi=ilp32e
    -march=rv32emc_zicsr
    --sysroot=/home/xx/zephyr-sdk-0.17.0/riscv64-zephyr-elf/riscv64-zephyr-elf
    -imacros
    /home/xx/xx/zephyr/include/zephyr/toolchain/zephyr_stdint.h
    -Wall
    -Wformat
    -Wformat-security
    -Wno-format-zero-length
    -Wdouble-promotion
    -Wno-pointer-sign
    -Wpointer-arith
    -Wexpansion-to-defined
    -Wno-unused-but-set-variable
    -Werror=implicit-int
    -fno-pic
    -fno-pie
    -fno-asynchronous-unwind-tables
    -ftls-model=local-exec
    -fno-reorder-functions
    --param=min-pagesize=0
    -fno-defer-pop
    -fmacro-prefix-map=/home/xx/xx/xx/xx/xx/src=CMAKE_SOURCE_DIR
    -fmacro-prefix-map=/home/xx/xx/zephyr=ZEPHYR_BASE
    -fmacro-prefix-map=/home/xx/xx=WEST_TOPDIR
    -ffunction-sections
    -fdata-sections
    -specs=picolibc.specs
    -std=c99
    -Werror
    -o
    CMakeFiles/app.dir/main.c.obj
    -c
    /home/xx/xx/xx/xx/xx/src/main.c",
  "file": "/home/xx/xx/xx/xx/xx/src/main.c",
  "output": "CMakeFiles/app.dir/main.c.obj"
},

It seems, that sonar-scanner’s compiler probe tries to pass some incorrect parameters to our compiler, thus causing the fail. Running strace on sonar-scanner reveals, that the probe runs the compiler with the following set of params:
-E -quiet -v -march=rv32emc_zicsr -mabi=ilp32 -misa-spec=20191213 -march=rv32emc_zicsr -std=c99 -dM -dumpbase

but some of them are not correct for this particular GCC version:

riscv64-zephyr-elf-gcc: error: unrecognized command-line option ‘-quiet’

Are there ways to solve this issue?

Thank you

4

Hello @n_ppel, and welcome to the community.

I am surprised to see the -quiet flag in the probe command, and I am currently not entirely sure how it ended up there.

To help us track down the problem, would it be possible for you to share the verbose analysis logs? Such logs can be generated by adding the -Dsonar.verbose=true parameter to the scanner CLI, see here.

Additionally, it would be helpful if you could share your full unredacted compilation database with us. I am starting a private thread with you in case you would be willing to share this info privately.

Thanks for sharing the issue with us,
Michael

6

It turned out that the rv32e architecture is not properly supported at the moment. We have created an internal ticket to fix that. The current workaround is to compile for a different architecture or use Automatic Analysis.

Thanks @n_ppel for the feedback.