使用 Zlib 构建 Libcurl 时出现错误

Question

I'm trying to build a static library - libcurl + zlib, but I get an error:(

-I built static-debug Zlib and as stated in the libcurl instructions Readme in the folder winbuild:

• I created a folder deps:

• deps/include: copied zconf.h and zlib.h here

• deps/lib: copied zlib_a.lib here (x32 debug)

Then i opened the VS2019(x32) command prompt and entered the command:

nmake /f Makefile.vc mode=static vc=16 debug=yes WITH_ZLIB=static

But I immediately get an error!!!

configuration name: libcurl-vc16-x86-debug-static-zlib-static-ipv6-sspi-schannel
        cl /Od /D_DEBUG /RTC1 /Z7 /LDd /MTd /DCURL_STATICLIB /I. /I ../lib /I../include /nologo /W4 /EHsc /DWIN32 /FD /c /DBUILDING_LIBCURL /DHAVE_ZLIB_H /DHAVE_ZLIB /DHAVE_LIBZ  /I"../../deps/include"  /DUSE_WIN32_IDN /DWANT_IDN_PROTOTYPES  /DUSE_IPV6  /DUSE_WINDOWS_SSPI /DUSE_SCHANNEL /Fo"..\builds\libcurl-vc16-x86-debug-static-zlib-static-ipv6-sspi-schannel-obj-lib/content_encoding.obj"  ..\lib\content_encoding.c
content_encoding.c
..\lib\content_encoding.c(30): fatal error C1083: **Unable to open the enable file: zlib.h**: No such file or directory,
NMAKE : fatal error U1077: "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\bin\HostX86\x86\cl.EXE" : return code "0x2"
Stop.
NMAKE : fatal error U1077: "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\bin\HostX86\x86\nmake.exe" : return code "0x2"
Stop.

Unable to open the enable file: zlib.h

What the hell is going on here? Why can't I open this file? Which path is it trying to open the zlib.h file?

Answer 1

Where have you created the directory deps ?

cl /I. /I ../lib /I../include /I"../../deps/include" ..\lib\content_encoding.c

The working directory is winbuild , the directory deps is expected to be in ../../deps . Assuming you cloned curl sources to curl , the directory deps should be in the same directly where curl is, ie near curl .

curl/
  ...
  lib/
  winbuild/
  ...
deps/
  include/
    zlib/
      zconf.h
      zlib.h