Info Catalog automake-1.16: Usage of Conditionals automake-1.16: Conditionals

automake-1.16: Limits of Conditionals

 
 20.2 Limits of Conditionals
 ===========================
 
 Conditionals should enclose complete statements like variables or rules
 definitions.  Automake cannot deal with conditionals used inside a
 variable definition, for instance, and is not even able to diagnose this
 situation.  The following example would not work:
 
      # This syntax is not understood by Automake
      AM_CPPFLAGS = \
        -DFEATURE_A \
      if WANT_DEBUG
        -DDEBUG \
      endif
        -DFEATURE_B
 
    However the intended definition of ‘AM_CPPFLAGS’ can be achieved with
 
      if WANT_DEBUG
        DEBUGFLAGS = -DDEBUG
      endif
      AM_CPPFLAGS = -DFEATURE_A $(DEBUGFLAGS) -DFEATURE_B
 
 or
 
      AM_CPPFLAGS = -DFEATURE_A
      if WANT_DEBUG
      AM_CPPFLAGS += -DDEBUG
      endif
      AM_CPPFLAGS += -DFEATURE_B
 
    More details and examples of conditionals are described alongside
DONTPRINTYET  various Automake features in this manual (⇒Conditional
 Subdirectories, ⇒Conditional Sources, *noteConditional
DONTPRINTYET DONTPRINTYET  various Automake features in this manual (⇒Conditional
 Subdirectories, ⇒Conditional Sources, ⇒Conditional

 Programs, ⇒Conditional Libtool Libraries, *noteConditional
DONTPRINTYET DONTPRINTYET  various Automake features in this manual (⇒Conditional
 Subdirectories, ⇒Conditional Sources, ⇒Conditional

 Programs, ⇒Conditional Libtool Libraries, ⇒Conditional

 Libtool Sources).
 

Info Catalog automake-1.16: Usage of Conditionals automake-1.16: Conditionals