From: Tomer Lev <me@tomerlev.com>
Date: Thu, 12 Feb 2026 13:23:09 +0000 (+0200)
Subject: cmake: add PKGCONFIG_EXTRA_LIBS option for pkg-config (#361)
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f3791575bbddd887046aa510193bea2cfacbb2fa;p=thirdparty%2Fvectorscan.git

cmake: add PKGCONFIG_EXTRA_LIBS option for pkg-config (#361)

Add a CMake cache variable to pass arbitrary flags to the pkg-config
Libs line. This enables CGO builds using GCC (not g++) to link correctly
by allowing users to specify C++ stdlib dependencies.

Usage: cmake -DPKGCONFIG_EXTRA_LIBS="-lstdc++ -lm" ...
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 577f90e2..ea0ae710 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -247,6 +247,7 @@ set(HAVE_SHMGET ${HAVE_SHMGET} CACHE BOOL "shmget()")
 configure_file(${CMAKE_MODULE_PATH}/config.h.in ${PROJECT_BINARY_DIR}/config.h)
 configure_file(src/hs_version.h.in ${PROJECT_BINARY_DIR}/hs_version.h)
 
+set(PKGCONFIG_EXTRA_LIBS "" CACHE STRING "Extra libraries to add to pkg-config Libs")
 configure_file(libhs.pc.in libhs.pc @ONLY) # only replace @ quoted vars
 install(FILES ${CMAKE_BINARY_DIR}/libhs.pc
     DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
diff --git a/chimera/libch.pc.in b/chimera/libch.pc.in
index 1eaf5bce..f3b37885 100644
--- a/chimera/libch.pc.in
+++ b/chimera/libch.pc.in
@@ -7,6 +7,6 @@ Name: libch
 Description: Intel(R) Chimera Library
 Version: @HS_VERSION@
 Requires.private: libhs
-Libs: -L${libdir} -lchimera
+Libs: -L${libdir} -lchimera @PKGCONFIG_EXTRA_LIBS@
 Libs.private: @PRIVATE_LIBS@
 Cflags: -I${includedir}/hs
diff --git a/libhs.pc.in b/libhs.pc.in
index d1e3ffb0..85007156 100644
--- a/libhs.pc.in
+++ b/libhs.pc.in
@@ -6,5 +6,5 @@ includedir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@
 Name: libhs
 Description: A portable fork of the high-performance regular expression matching library
 Version: @HS_VERSION@
-Libs: -L${libdir} -lhs
+Libs: -L${libdir} -lhs @PKGCONFIG_EXTRA_LIBS@
 Cflags: -I${includedir}/hs