Can I compile all cpp files in src to o s in obj then link to binary in

Question

My project directory looks like this    project     Makefile     main      src         main cpp         foo cpp         foo h         bar cpp         bar h      obj         main o         foo o         bar o   What I would like my makefile to do would be to compile all  cpp files in the  src folder to  o files in the  obj folder  then link all the  o files in  obj into the output binary in the top-level folder  project   I have next to no experience with Makefiles  and am not really sure what to search for to accomplish this   Also  is this a  good  way to do this  or is there a more standard approach to what I m trying to do

User · Accepted Answer

Makefile part of the question  This is pretty easy  unless you don t need to generalize try something like the code below  but replace space indentation with tabs near g     SRC DIR        src OBJ DIR        obj SRC FILES      wildcard   SRC DIR    cpp  OBJ FILES      patsubst   SRC DIR    cpp   OBJ DIR    o   SRC FILES   LDFLAGS        CPPFLAGS        CXXFLAGS         main exe    OBJ FILES     g     LDFLAGS  -o          OBJ DIR    o    SRC DIR    cpp    g     CPPFLAGS    CXXFLAGS  -c -o      lt      Automatic dependency graph generation  A  must  feature for most make systems  With GCC in can be done in a single pass as a side effect of the compilation by adding -MMD flag to CXXFLAGS and  -include   OBJ FILES  o  d   to the end of the makefile body   CXXFLAGS    -MMD -include   OBJ FILES  o  d    And as guys mentioned already  always have GNU Make Manual around  it is very helpful

User · Answer

Wildcard works for me also  but I d like to give a side note for those using directory variables  Always use slash for folder tree  not backslash   otherwise it will fail   BASEDIR         SRCDIR     BASEDIR  src INSTALLDIR     BASEDIR  lib  MODULES     wildcard   SRCDIR    cpp  OBJS     wildcard   o

[c++] Can I compile all .cpp files in src/ to .o's in obj/, then link to binary in ./?

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