Adds a feature to compile targets in a deterministic way.

bakerstu · Dec 12, 2020 · c9749ed · c9749ed
1 parent e1a5c7d
commit c9749ed
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diff --git a/etc/bare.armv7m.mk b/etc/bare.armv7m.mk
@@ -33,6 +33,10 @@ ARCHOPTIMIZATION += -O3 -fno-strict-aliasing -fno-strength-reduce -fomit-frame-p
 
 ARCHFLAGS = -g -MD -MP -march=armv7-m -mthumb -mfloat-abi=soft
 
+ifdef DETERMINISTIC_COMPILATION
+ARCHFLAGS += -frandom-seed=$(shell echo $(abspath $<) | md5sum  | sed 's/\(.*\) .*/\1/')
+endif
+
 ASFLAGS = -c $(ARCHFLAGS)
 
 CORECFLAGS = $(ARCHFLAGS) -Wall -Werror -Wno-unknown-pragmas \

diff --git a/etc/freertos.armv7m.mk b/etc/freertos.armv7m.mk
@@ -39,6 +39,10 @@ ARCHOPTIMIZATION += -Os -fno-strict-aliasing -fno-strength-reduce -fomit-frame-p
 
 ARCHFLAGS = -g -MD -MP -mcpu=cortex-m3 -mthumb -mfloat-abi=soft
 
+ifdef DETERMINISTIC_COMPILATION
+ARCHFLAGS += -frandom-seed=$(shell echo $(abspath $<) | md5sum  | sed 's/\(.*\) .*/\1/')
+endif
+
 ifdef DEBUG_MEMORY_USE
 #warning: -funwind-tables adds 10k code size. Needed for malloc debugging.
 ARCHFLAGS += -funwind-tables