Re: LDFLAGS overriding

I think your 'override' fix is correct.  Personally I think override
should be used in most cases in our code because we are usually careful
to add to any flags already supplied by the user.

---------------------------------------------------------------------------

Neil Conway wrote:
> Overriding the value of LDFLAGS breaks the build:
>
> $ make LDFLAGS=-g
> gcc-3.4 -O2 -fno-strict-aliasing -g -Wall -Wmissing-prototypes
> -Wmissing-declarations -DFRONTEND -I../../src/include
> -I/home/neilc/build-pgsql/src/../../pgsql/src/include -D_GNU_SOURCE   -c
> -o dirmod.o dirmod.c -MMD
> gcc-3.4 -O2 -fno-strict-aliasing -g -Wall -Wmissing-prototypes
> -Wmissing-declarations zic.o ialloc.o scheck.o localtime.o dirmod.o -g
> -lpgport -lz -lreadline -lcrypt -lresolv -lnsl -ldl -lm  -o zic
> /usr/bin/ld: cannot find -lpgport
> collect2: ld returned 1 exit status
> make[2]: *** [zic] Error 1
> make[2]: Leaving directory `/home/neilc/build-pgsql/src/timezone'
> make[1]: *** [all] Error 2
>
> (The "-g" flag is just for example.)
>
> IMHO we ought to let users override LDFLAGS, just like we let them
> override CFLAGS. When we need to modify LDFLAGS unconditionally (i.e.
> regardless of whether the user has already defined it), the "override"
> directive should be used. Attached is a trivial patch that fixes the
> build for me.
>
> There are a few other assignments/concatenations to LDFLAGS that are
> going to be skipped if there is a user-defined LDFLAGS (e.g. enabling
> rpath in src/Makefile.global.in, and some HPUX port-specific stuff). I
> wasn't sure if this should also ignore user-defined LDFLAGS, so I didn't
> modify it.
>
> Comments? (I won't claim to be a make expert, so it's entirely possible
> this change is off the mark.)
>
> -Neil
>

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