Hi,
dime.pc ships the full build-time CFLAGS in its Cflags: line, including
-D_FORTIFY_SOURCE=2 (and -g -O2 -fstack-protector-strong -Wformat
-Werror=format-security -Wdate-time -ffile-prefix-map=...):
Cflags: -I${includedir} -g -O2 -ffile-prefix-map=/build/dime-fqJZ8y/dime-0.20111205=. -fstack-protector-strong -Wformat -Werror=format-security -I${prefix}/include -Wdate-time -D_FORTIFY_SOURCE=2
lintian flags this as an error:
E: libdime-dev: pkg-config-bad-directive -D_FORTIFY_SOURCE=2 [usr/lib/x86_64-linux-gnu/pkgconfig/dime.pc]