anthraxx
commented
8 years ago - append CFLAGS instead of force-set it, this was distributions can also add their own CFLAGS in addition (this is very common).
- introduce LDFLAGS so distributions can set their own additional flags for the linker and append instead of set (this is very common)
- replace static /usr/local/lib with a PREFIX variable with default value of /usr/local so a distribution can easily use PREFIX=/usr (this is also common)
- introduce DESTDIR for distribution wide packaging as they build in chroots and deploy into a special directory structure that will later put into a tarball and lands in a distribution package. f.e. DESTDIR="/build/package" (this is also common for packaging)
- adding -D to install call to create all leading components of the destination. This is very important if the DESTDIR is set for packaging the therefor the structure does not yet exists. This will then basically freate the directory structure. in case DESTDIR is not used and /usr/local/lib f.e. already exists this will do nothing this is highly common to do it this way. We add the ${TARGET} to the end because we use the -D parameter and therefor we need to also pass the resulting filename