c - libgcrypt-config --libs: no such file or directory -

i'm using gcrypt, compiler seems unable find it. here makefile. function.c function source file containing functions defined; wrote header file miao.h function declaration, , gcrypt.h included in it. main.c source file including miao.h. when make: .could me? bothers me long.

cc = gcc cflags = 'libgcrypt-config --cflags' libs = 'libgcrypt-config --libs' objs = function.o main.o main  all: $(objs)  function.o: function.c     $(cc) -c function.c $(cflags)  main.o: main.c     $(cc) -c main.c  $(cflags)  main: main.o function.o     $(cc) -o main main.o function.o $(libs)  clean:     rm $(objs) 

the makefile should written more following:

caveat: unable test makefile not have libgcrypt-config available.

per web site: https://gnupg.org/documentation/manuals/gcrypt/building-sources.html libgcrypt-config executable should surrounded back-ticks, not single quotes executed in current shell.

(back ticks on stackoverflow result in emphasised text should still visible should placed.)

note: have placed <tab> actual makefile needs have tab character

note: targets, all , clean not produce file same name, in file there needs statement: .phony: clean

when defining macro, use := rather = macro evaluated once.

any calls shell functions should incorporated via macro, easy make change. in general best include path shell function: wrote on linux, path may different. specifying actual path becomes important when cross compiling or there duplicate names visible via $path statement (as can case gcc)

note: actual libgcrypt-config executable must in visible via $path environment variable.

note: individual compile statements reduced following 2 lines: (and nothing else needed compiles)

%.o: %.c  <tab>$(cc)  -c $< -o $@ -i. $(cflags) 

note: not place contents of rule dependencies expected. error noted in clean: target

the proposed makefile follows:

cc := /usr/bin/gcc rm := /usr/bin/rm  cflags := `libgcrypt-config --cflags`  libs := `libgcrypt-config --libs`  objs := function.o main.o main  target := main  .phony: clean  all: $(target)  function.o: function.c <tab>$(cc) -c function.c $(cflags) -o function.o -i.  main.o: main.c <tab>$(cc) -c main.c  $(cflags) -o main.o -i.  $(target): $(objs) <tab>$(cc) -o $(target) $(objs) $(libs)  clean: <tab>$(rm) -f $(objs)