by linking `lib/dynbuf.c` when building a static curl binary.
Previously this source file was only included when building
a dynamic curl binary. This was likely possibly because no
functions from the `src/Makefile.inc` / `CURLX_CFILES` sources
were actually required for a curl tool build. This has
recently changed with the introduction of `curlx_dyn_*()`
memory functions and their use by the tool sources.
Closes #6060
curl_PROGRAMS = curl.exe
curl_OBJECTS := $(patsubst %.c,%.o,$(strip $(CURL_CFILES)))
curlx_OBJECTS := $(patsubst %.c,%.o,$(notdir $(strip $(CURLX_CFILES))))
-ifdef DYN
curl_OBJECTS += $(curlx_OBJECTS)
vpath %.c $(PROOT)/lib
-endif
RESOURCE = curl.res