From 9ddec05248d0084c4bfe737fa9ab3cf61f3ecd4a Mon Sep 17 00:00:00 2001
From: Paul Zander <negril.nx+gentoo@gmail.com>
Date: Thu, 12 Mar 2026 16:38:02 +0100
Subject: make static libs optional

Signed-off-by: Paul Zander <negril.nx+gentoo@gmail.com>

diff --git a/blas/CMakeLists.txt b/blas/CMakeLists.txt
index 2bd498a11..0b605cc9e 100644
--- a/blas/CMakeLists.txt
+++ b/blas/CMakeLists.txt
@@ -15,8 +15,10 @@ set(EigenBlas_SRCS  single.cpp double.cpp complex_single.cpp complex_double.cpp
 
 set(EIGEN_BLAS_TARGETS "")
 
+if (EIGEN_BUILD_STATIC_LIBS)
 add_library(eigen_blas_static STATIC ${EigenBlas_SRCS})
 list(APPEND EIGEN_BLAS_TARGETS eigen_blas_static)
+endif()
 
 if (EIGEN_BUILD_SHARED_LIBS)
   add_library(eigen_blas SHARED ${EigenBlas_SRCS} "eigen_blas.def")
@@ -34,7 +36,9 @@ foreach(target IN LISTS EIGEN_BLAS_TARGETS)
 
   add_dependencies(blas ${target})
   include(GNUInstallDirs)
+  if (NOT EIGEN_INSTALL_STATIC_LIBS AND NOT ${target} EQUAL eigen_blas_static)
   install(TARGETS ${target})
+  endif()
 endforeach()
 
 if(EIGEN_BUILD_TESTING)
diff --git a/lapack/CMakeLists.txt b/lapack/CMakeLists.txt
index f98f77afc..4ea553b56 100644
--- a/lapack/CMakeLists.txt
+++ b/lapack/CMakeLists.txt
@@ -101,9 +101,11 @@ endif()
 
 set(EIGEN_LAPACK_TARGETS "")
 
+if (EIGEN_BUILD_STATIC_LIBS)
 add_library(eigen_lapack_static STATIC ${EigenLapack_SRCS} ${ReferenceLapack_SRCS})
 target_link_libraries(eigen_lapack_static  eigen_blas_static)
 list(APPEND EIGEN_LAPACK_TARGETS eigen_lapack_static)
+endif()
 
 if (EIGEN_BUILD_SHARED_LIBS)
   add_library(eigen_lapack SHARED ${EigenLapack_SRCS} ${EIGEN_LAPACK_DEF})
@@ -123,7 +125,9 @@ foreach(target IN LISTS EIGEN_LAPACK_TARGETS)
   target_link_libraries(${target} Eigen3::Eigen)
   add_dependencies(lapack ${target})
   include(GNUInstallDirs)
+  if (NOT EIGEN_INSTALL_STATIC_LIBS AND NOT ${target} EQUAL eigen_lapack_static)
   install(TARGETS ${target})
+  endif()
 endforeach()
 
 
-- 
2.53.0