Reset the LDFLAGS and building helper executables

[Laurent Bigonville]

Hello,

When enabling the hardening flags on debian (adding bindnow and PIE) I 
get the following message:

gcc -DHAVE_CONFIG_H -I. -I../../../lib -I..  -I. -I../../.. 
-I../../../auparse  '-DTABLE_H="actiontab.h"' -g -O2 -c -o 
gen_actiontabs_h-gen_tables.o `test -f 'gen_tables.c' || echo 
'../../../lib/'`gen_tables.c
/bin/bash ../libtool  --tag=CC   --mode=link gcc 
'-DTABLE_H="actiontab.h"' -g -O2  -fPIE -pie -Wl,-z,relro -Wl,-z,now 
-Wl,--as-needed -o gen_actiontabs_h gen_actiontabs_h-gen_tables.o
libtool: link: gcc -DTABLE_H=\"actiontab.h\" -g -O2 -fPIE -pie -Wl,-z 
-Wl,relro -Wl,-z -Wl,now -Wl,--as-needed -o gen_actiontabs_h 
gen_actiontabs_h-gen_tables.o
/usr/bin/ld: gen_actiontabs_h-gen_tables.o: relocation R_X86_64_32 
against `.rodata.str1.1' can not be used when making a shared object; 
recompile with -fPIC
gen_actiontabs_h-gen_tables.o: error adding symbols: Bad value
collect2: error: ld returned 1 exit status

Looking that build system, it seems that CFLAGS and CPPFLAGS for these 
executables are overriden in lib/Makefile.am and auparse/Makefile.am 
(with CFLAGS_FOR_BUILD and CPPFLAGS_FOR_BUILD) but the LDFLAGS are left 
untouched.

Shouldn't the LDFLAGS also be reset when building these executables?

Regards,

Laurent Bigonville