Fix stdlib in clang, limit test to a few targets

Author: danielinux

.github/workflows/test-build.yml

@@ -78,7 +78,17 @@ jobs:
           sudo apt-get install -y gcc-arm-none-eabi gcc-aarch64-linux-gnu gcc-powerpc-linux-gnu gnu-efi
 
       - name: Install Clang
-        if: inputs.arch == 'arm' || inputs.arch == 'ARM'
+        if: |
+          inputs.config-file == './config/examples/stm32c0.config' ||
+          inputs.config-file == './config/examples/stm32c0-rsa2048.config' ||
+          inputs.config-file == './config/examples/stm32h5.config' ||
+          inputs.config-file == './config/examples/stm32h5-dualbank.config' ||
+          inputs.config-file == './config/examples/stm32h7.config' ||
+          inputs.config-file == './config/examples/stm32h7-octospi.config' ||
+          inputs.config-file == './config/examples/stm32u5.config' ||
+          inputs.config-file == './config/examples/stm32u5-wolfcrypt-tz.config' ||
+          inputs.config-file == './config/examples/stm32u5-nonsecure-dualbank.config' ||
+          inputs.config-file == 'config/examples/stm32n567.config'
         run: |
           sudo apt-get install -y clang
 
@@ -99,7 +109,17 @@ jobs:
           make ${{inputs.make-args}}
 
       - name: Rebuild wolfboot with Clang
-        if: inputs.arch == 'arm' || inputs.arch == 'ARM'
+        if: |
+          inputs.config-file == './config/examples/stm32c0.config' ||
+          inputs.config-file == './config/examples/stm32c0-rsa2048.config' ||
+          inputs.config-file == './config/examples/stm32h5.config' ||
+          inputs.config-file == './config/examples/stm32h5-dualbank.config' ||
+          inputs.config-file == './config/examples/stm32h7.config' ||
+          inputs.config-file == './config/examples/stm32h7-octospi.config' ||
+          inputs.config-file == './config/examples/stm32u5.config' ||
+          inputs.config-file == './config/examples/stm32u5-wolfcrypt-tz.config' ||
+          inputs.config-file == './config/examples/stm32u5-nonsecure-dualbank.config' ||
+          inputs.config-file == 'config/examples/stm32n567.config'
         run: |
           make distclean
           cp ${{inputs.config-file}} .config

arch.mk

@@ -1300,7 +1300,6 @@ ifeq ($(USE_CLANG),1)
   CFLAGS+=-DWOLFSSL_NO_ATOMIC -DWOLFSSL_NO_ATOMICS
   CFLAGS+=-Wno-unknown-attributes -Wno-error=unknown-attributes
   CFLAGS+=-fno-unwind-tables -fno-asynchronous-unwind-tables
-  LDFLAGS+=-nostdlib
   LSCRIPT_FLAGS+=-T hal/clang-discard.ld
 endif
 

test-app/Makefile

@@ -305,7 +305,10 @@ ifeq ($(TZEN),1)
                 WOLFCRYPT_APP_OBJS+=$(WOLFBOOT_LIB_WOLFSSL)/wolfcrypt/src/random.o
             endif
         endif
-        CFLAGS+=-DWOLFBOOT_SECURE_CALLS -Wstack-usage=19184
+        CFLAGS+=-DWOLFBOOT_SECURE_CALLS
+        ifneq ($(USE_CLANG),1)
+          CFLAGS+=-Wstack-usage=19184
+        endif
         LDFLAGS+=--specs=nosys.specs -u _printf_float
     endif
     ifeq ($(WOLFCRYPT_TZ_PSA),1)