build: use printf instead of echo

[dong-zeyu]

At

camera-streamer/Makefile

Line 76 in e43e93c

echo "#define GIT_VERSION \"$(GIT_VERSION)\"\n#define GIT_REVISION \"$(GIT_REVISION)\"" > version.h.tmp; \

echo gives

$ echo "#define GIT_VERSION \"v0.2.7\"\n#define GIT_REVISION \"e43e93c\""
#define GIT_VERSION "v0.2.7"\n#define GIT_REVISION "e43e93c"

while printf gives

$ printf "#define GIT_VERSION \"v0.2.7\"\n#define GIT_REVISION \"e43e93c\""
#define GIT_VERSION "v0.2.7"
#define GIT_REVISION "e43e93c"

This link explained why printf is preferred than echo.

[ayufan]

Thanks, will fix it.

[samdelong]

I ran into the same issue. I fixed by using echo -e.
Glad this is already in a PR!

It currently will not build until the change is made (RPI Arch), so this should be merged ASAP

[dong-zeyu]

I rebased this patch on top of main branch. Now it should be ready to merge.