Hello, my reading of the automake manual is that for an AM_CONDITIONAL Z
AM_LDFLAGS = -flto if Z a_LDFLAGS = -O3 endif means: if Z is defined, a_LDFLAGS is used and AM_LDFLAGS are not used. if Z is not defined, a_LDFLAGS is absent and AM_LDFLAGS are used. But looking in Makefile.in the code looks like this: @Z_TRUE@a_LDFLAGS = -O3 a_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC \ $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \ $(AM_CFLAGS) $(CFLAGS) $(a_LDFLAGS) $(LDFLAGS) -o $@ which means, that AM_LDFLAGS is always ignored. The manual says in “Program and Library Variables”: ‘maude_LDFLAGS’ This variable is used to pass extra flags to the link step of a program or a shared library. It overrides the ‘AM_LDFLAGS’ variable. Regards Дилян