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cmake: add a helper for linking into static libs #1678

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Jun 24, 2025
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cmake: add a helper for linking into static libs #1678

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11 changes: 10 additions & 1 deletion src/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -54,13 +54,19 @@ add_library(secp256k1_precomputed OBJECT EXCLUDE_FROM_ALL
# from being exported.
target_sources(secp256k1 PRIVATE secp256k1.c $<TARGET_OBJECTS:secp256k1_precomputed>)

# Create a helper lib that parent projects can use to link secp256k1 into a
# static lib.
add_library(secp256k1_objs INTERFACE)
target_sources(secp256k1_objs INTERFACE $<TARGET_OBJECTS:secp256k1> $<TARGET_OBJECTS:secp256k1_precomputed>)

add_library(secp256k1_asm INTERFACE)
if(SECP256K1_ASM STREQUAL "arm32")
add_library(secp256k1_asm_arm OBJECT EXCLUDE_FROM_ALL)
target_sources(secp256k1_asm_arm PUBLIC
asm/field_10x26_arm.s
)
target_sources(secp256k1 PRIVATE $<TARGET_OBJECTS:secp256k1_asm_arm>)
target_sources(secp256k1_objs INTERFACE $<TARGET_OBJECTS:secp256k1_asm_arm>)
target_link_libraries(secp256k1_asm INTERFACE secp256k1_asm_arm)
endif()

Expand All @@ -75,10 +81,13 @@ endif()
get_target_property(use_pic secp256k1 POSITION_INDEPENDENT_CODE)
set_target_properties(secp256k1_precomputed PROPERTIES POSITION_INDEPENDENT_CODE ${use_pic})

# Add the include path for parent projects so that they don't have to manually add it.
target_include_directories(secp256k1 INTERFACE
# Add the include path for parent projects so that they don't have to manually add it.
$<BUILD_INTERFACE:$<$<NOT:$<BOOL:${PROJECT_IS_TOP_LEVEL}>>:${PROJECT_SOURCE_DIR}/include>>
)
set_target_properties(secp256k1_objs PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "$<TARGET_PROPERTY:secp256k1,INTERFACE_INCLUDE_DIRECTORIES>"
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This generator expression has a behaviour change in version 3.26, but it doesn't affect us.

)

# This emulates Libtool to make sure Libtool and CMake agree on the ABI version,
# see below "Calculate the version variables" in build-aux/ltmain.sh.
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