build: explain $PWD use

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/4639064

diff --git a/src/Make.ccmd b/src/Make.ccmd
index f04864ab65822ffc03c55a084e312e6b66cf1647..40cc3a0e8a2d0751bc6e42c9b27d7dc0ae19051b 100644 (file)
--- a/src/Make.ccmd
+++ b/src/Make.ccmd
@@ -36,6 +36,7 @@ y.tab.c: y.tab.h
 
 all: $(TARG)
 
+# Use $(PWD)/$*.c so that gdb shows full path in stack traces.
 %.$(HOST_O): %.c
        $(HOST_CC) $(HOST_CFLAGS) -c "$(PWD)/$*.c"
 

diff --git a/src/Make.clib b/src/Make.clib
index 25fe88463cb4c5c595190d348e9594bca8f6f100..4a7ea02d9bf7af8e4e4edf5e490b653a30fd15d5 100644 (file)
--- a/src/Make.clib
+++ b/src/Make.clib
@@ -6,6 +6,7 @@
 
 all: $(LIB)
 
+# Use $(PWD)/$*.c so that gdb shows full path in stack traces.
 %.$(HOST_O): %.c
        $(HOST_CC) $(HOST_CFLAGS) -c "$(PWD)/$*.c"