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CMake: Add HTTPLIB_SHARED option, don't define BUILD_SHARED_LIBS (#2266)

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To avoid surprises in the projects consuming the library, don't define
BUILD_SHARED_LIBS option ourselves but just use its value, if provided,
to define HTTPLIB_SHARED option which can be also set directly to
specify whether we should build static or shared library.

Closes #2263.
This commit is contained in:
VZ
2025-11-11 04:17:43 +01:00
committed by GitHub
parent 4b2b851dbb
commit 1acf18876f
1 changed files with 17 additions and 9 deletions
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26
CMakeLists.txt
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@@ -1,6 +1,6 @@
#[[ #[[
Build options: Build options:
* BUILD_SHARED_LIBS (default off) builds as a shared library (if HTTPLIB_COMPILE is ON) * Standard BUILD_SHARED_LIBS is supported and sets HTTPLIB_SHARED default value.
* HTTPLIB_USE_OPENSSL_IF_AVAILABLE (default on) * HTTPLIB_USE_OPENSSL_IF_AVAILABLE (default on)
* HTTPLIB_USE_ZLIB_IF_AVAILABLE (default on) * HTTPLIB_USE_ZLIB_IF_AVAILABLE (default on)
* HTTPLIB_USE_BROTLI_IF_AVAILABLE (default on) * HTTPLIB_USE_BROTLI_IF_AVAILABLE (default on)
@@ -13,6 +13,7 @@
* HTTPLIB_USE_NON_BLOCKING_GETADDRINFO (default on) * HTTPLIB_USE_NON_BLOCKING_GETADDRINFO (default on)
* HTTPLIB_COMPILE (default off) * HTTPLIB_COMPILE (default off)
* HTTPLIB_INSTALL (default on) * HTTPLIB_INSTALL (default on)
* HTTPLIB_SHARED (default off) builds as a shared library (if HTTPLIB_COMPILE is ON)
* HTTPLIB_TEST (default off) * HTTPLIB_TEST (default off)
* BROTLI_USE_STATIC_LIBS - tells Cmake to use the static Brotli libs (only works if you have them installed). * BROTLI_USE_STATIC_LIBS - tells Cmake to use the static Brotli libs (only works if you have them installed).
* OPENSSL_USE_STATIC_LIBS - tells Cmake to use the static OpenSSL libs (only works if you have them installed). * OPENSSL_USE_STATIC_LIBS - tells Cmake to use the static OpenSSL libs (only works if you have them installed).
@@ -109,12 +110,20 @@ option(HTTPLIB_USE_CERTS_FROM_MACOSX_KEYCHAIN "Enable feature to load system cer
option(HTTPLIB_USE_NON_BLOCKING_GETADDRINFO "Enables the non-blocking alternatives for getaddrinfo." ON) option(HTTPLIB_USE_NON_BLOCKING_GETADDRINFO "Enables the non-blocking alternatives for getaddrinfo." ON)
option(HTTPLIB_REQUIRE_ZSTD "Requires ZSTD to be found & linked, or fails build." OFF) option(HTTPLIB_REQUIRE_ZSTD "Requires ZSTD to be found & linked, or fails build." OFF)
option(HTTPLIB_USE_ZSTD_IF_AVAILABLE "Uses ZSTD (if available) to enable zstd support." ON) option(HTTPLIB_USE_ZSTD_IF_AVAILABLE "Uses ZSTD (if available) to enable zstd support." ON)
# Defaults to static library # Defaults to static library but respects standard BUILD_SHARED_LIBS if set
option(BUILD_SHARED_LIBS "Build the library as a shared library instead of static. Has no effect if using header-only." OFF) include(CMakeDependentOption)
if(BUILD_SHARED_LIBS AND WIN32 AND HTTPLIB_COMPILE) cmake_dependent_option(HTTPLIB_SHARED "Build the library as a shared library instead of static. Has no effect if using header-only."
# Necessary for Windows if building shared libs "${BUILD_SHARED_LIBS}" HTTPLIB_COMPILE OFF
# See https://stackoverflow.com/a/40743080 )
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON) if(HTTPLIB_SHARED)
set(HTTPLIB_LIB_TYPE SHARED)
if(WIN32)
# Necessary for Windows if building shared libs
# See https://stackoverflow.com/a/40743080
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
endif()
else()
set(HTTPLIB_LIB_TYPE STATIC)
endif() endif()
if(CMAKE_SYSTEM_NAME MATCHES "Windows") if(CMAKE_SYSTEM_NAME MATCHES "Windows")
@@ -230,8 +239,7 @@ if(HTTPLIB_COMPILE)
# split.py puts output in "out" # split.py puts output in "out"
set(_httplib_build_includedir "${CMAKE_CURRENT_BINARY_DIR}/out") set(_httplib_build_includedir "${CMAKE_CURRENT_BINARY_DIR}/out")
# This will automatically be either static or shared based on the value of BUILD_SHARED_LIBS add_library(${PROJECT_NAME} ${HTTPLIB_LIB_TYPE} "${_httplib_build_includedir}/httplib.cc")
add_library(${PROJECT_NAME} "${_httplib_build_includedir}/httplib.cc")
target_sources(${PROJECT_NAME} target_sources(${PROJECT_NAME}
PUBLIC PUBLIC
$<BUILD_INTERFACE:${_httplib_build_includedir}/httplib.h> $<BUILD_INTERFACE:${_httplib_build_includedir}/httplib.h>