makefile missing separator

Question

I have a makefile (provided by third party) which gives the following error

Makefile:108: *** missing separator.  Stop.

The line in question is the following if statement.... any ideas? have tried various replacing tabs with spaces and not got very far at all...

if have_sdl
        libiulib_a_SOURCES += $(srcdir)/utils/dgraphics.cc
        libiulib_a_SOURCES += $(srcdir)/utils/SDL_lines.cc
        include_HEADERS += $(srcdir)/utils/SDL_lines.h
else
        libiulib_a_SOURCES += $(srcdir)/utils/dgraphics_nosdl.cc
endif

Answer 1

Try it this way:

ifneq ($(have_sdl),)
        libiulib_a_SOURCES += $(srcdir)/utils/dgraphics.cc
        libiulib_a_SOURCES += $(srcdir)/utils/SDL_lines.cc
        include_HEADERS += $(srcdir)/utils/SDL_lines.h
else
        libiulib_a_SOURCES += $(srcdir)/utils/dgraphics_nosdl.cc
endif

This checks if have_sdl is non empty (meaning defined to TRUE, yes, 1 or something other than empty string)

Answer 2

If there is no space between ifeq and opening of bracket then also it causes the same warning.

it should be ifeq ()