On Mon, Apr 09, 2018 at 04:21:54AM -0500, Yaakov Selkowitz wrote: > On 2018-04-09 03:59, Florian Weimer wrote: > > Is there a recommend way to get libtool to pass through all flags > > specified in CFLAGS and LDFLAGS unchanged, and have the GCC compiler > > driver sort out which flags to pass to the compiler/assembler/linker? > > $ libtool --mode=compile --help > [snip] > This mode accepts the following additional options: > [snip] > -Wc,FLAG pass FLAG directly to the compiler > > $ libtool --mode=link --help > [snip] > The following components of LINK-COMMAND are treated specially: > [snip] > -Wc,FLAG > -Xcompiler FLAG pass linker-specific FLAG directly to the compiler > -Wl,FLAG > -Xlinker FLAG pass linker-specific FLAG directly to the linker > > But, often when this happens, it is the fault of a poorly written > configure.ac or Makefile.am. Where exactly are you seeing an issue?
Even if you use -Wl,FLAG, libtool may well still screw it up, because it arbitrarily re-orders all -Wl,FLAG args to come after/ the -lLIB args. This breaks flags which are position sensitive like -Wl,--as-needed eg libdemo_la_LDFLAGS = -Wl,--as-needed -lm -Wl,--no-as-needed -lvirt will get turned into gcc .... -lm -lvirt -Wl,--as-needed -Wl,--no-as-needed Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :| _______________________________________________ devel mailing list -- [email protected] To unsubscribe send an email to [email protected]
