cpu/*/Makefile.feature: simple expansion for CPU_ARCH

Simple expansion is recommended by official documentation [1] for a multitude of reasons over recursive expansion, of which predictable behavior (and, thus, maintainability of Makefiles) and performance are the biggest arguments. [1]: https://www.gnu.org/software/make/manual/html_node/Flavors.html
RIOT-OS · Feb 16, 2021 · 501e346 · 501e346
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commit 501e346
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Showing 5 changed files with 8 additions and 8 deletions.
diff --git a/cpu/arm7_common/Makefile.features b/cpu/arm7_common/Makefile.features
@@ -1,5 +1,5 @@
-CPU_ARCH = armv4t
-CPU_CORE = arm7tdmi_s
+CPU_ARCH := armv4t
+CPU_CORE := arm7tdmi_s
 
 FEATURES_PROVIDED += arch_32bit
 FEATURES_PROVIDED += arch_arm

diff --git a/cpu/esp32/Makefile.features b/cpu/esp32/Makefile.features
@@ -1,5 +1,5 @@
-CPU_ARCH = xtensa-lx6
-CPU_FAM = esp32
+CPU_ARCH := xtensa-lx6
+CPU_FAM := esp32
 
 # MCU defined features that are provided independent on board definitions
 

diff --git a/cpu/esp8266/Makefile.features b/cpu/esp8266/Makefile.features
@@ -1,5 +1,5 @@
-CPU_ARCH = xtensa-lx106
-CPU_FAM = esp8266
+CPU_ARCH := xtensa-lx106
+CPU_FAM := esp8266
 
 
 # MCU defined features that are provided independent on board definitions

diff --git a/cpu/mips32r2_common/Makefile.features b/cpu/mips32r2_common/Makefile.features
@@ -1,4 +1,4 @@
-CPU_ARCH = mips32r2
+CPU_ARCH := mips32r2
 
 FEATURES_PROVIDED += arch_32bit
 FEATURES_PROVIDED += arch_mips32r2

diff --git a/cpu/riscv_common/Makefile.features b/cpu/riscv_common/Makefile.features
@@ -1,4 +1,4 @@
-CPU_ARCH = risc-v
+CPU_ARCH := risc-v
 
 FEATURES_PROVIDED += arch_32bit
 FEATURES_PROVIDED += arch_riscv