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CMake: library not created
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I have a project directory A which has sub directories B and C.
I want C as a shared object library and let B use it.
The CMakeLists.txt looks like following -
A
...
add_subdirectory(C)
add_subdirectory(B)
...
[ 1) Does this ensure that C is cmake(ed) first and then B? ]
B
...
pkg_check_modules(C_LIB REQUIRED C)
target_link_libraries(B C_LIB)
...
C
...
add_library (C SHARED ./*c)
...
I get an error in build which says no package c found.
However, if I have directory C in the same hierarchy as A, I am able to get the linking of B and C properly.
I want to place my code in A and get the dependencies correct. What am I missing in my CMakeLists.txt?
cmake dependencies subdirectories
edited Mar 23 at 2:32
avariant
1,81831221
asked Mar 22 at 22:07
UnniboyUnniboy
12
add a comment |
I have a project directory A which has sub directories B and C.
I want C as a shared object library and let B use it.
The CMakeLists.txt looks like following -
A
...
add_subdirectory(C)
add_subdirectory(B)
...
[ 1) Does this ensure that C is cmake(ed) first and then B? ]
B
...
pkg_check_modules(C_LIB REQUIRED C)
target_link_libraries(B C_LIB)
...
C
...
add_library (C SHARED ./*c)
...
I get an error in build which says no package c found.
However, if I have directory C in the same hierarchy as A, I am able to get the linking of B and C properly.
I want to place my code in A and get the dependencies correct. What am I missing in my CMakeLists.txt?
cmake dependencies subdirectories
edited Mar 23 at 2:32
avariant
1,81831221
asked Mar 22 at 22:07
UnniboyUnniboy
12
add a comment |
I have a project directory A which has sub directories B and C.
I want C as a shared object library and let B use it.
The CMakeLists.txt looks like following -
A
...
add_subdirectory(C)
add_subdirectory(B)
...
[ 1) Does this ensure that C is cmake(ed) first and then B? ]
B
...
pkg_check_modules(C_LIB REQUIRED C)
target_link_libraries(B C_LIB)
...
C
...
add_library (C SHARED ./*c)
...
I get an error in build which says no package c found.
However, if I have directory C in the same hierarchy as A, I am able to get the linking of B and C properly.
I want to place my code in A and get the dependencies correct. What am I missing in my CMakeLists.txt?
cmake dependencies subdirectories
edited Mar 23 at 2:32
avariant
1,81831221
asked Mar 22 at 22:07
UnniboyUnniboy
12
I have a project directory A which has sub directories B and C.
I want C as a shared object library and let B use it.
The CMakeLists.txt looks like following -
A
...
add_subdirectory(C)
add_subdirectory(B)
...
[ 1) Does this ensure that C is cmake(ed) first and then B? ]
B
...
pkg_check_modules(C_LIB REQUIRED C)
target_link_libraries(B C_LIB)
...
C
...
add_library (C SHARED ./*c)
...
I get an error in build which says no package c found.
However, if I have directory C in the same hierarchy as A, I am able to get the linking of B and C properly.
I want to place my code in A and get the dependencies correct. What am I missing in my CMakeLists.txt?
cmake dependencies subdirectories
cmake dependencies subdirectories
edited Mar 23 at 2:32
avariant
1,81831221
asked Mar 22 at 22:07
UnniboyUnniboy
12
edited Mar 23 at 2:32
avariant
1,81831221
asked Mar 22 at 22:07
UnniboyUnniboy
12
edited Mar 23 at 2:32
avariant
1,81831221
edited Mar 23 at 2:32
avariant
1,81831221
edited Mar 23 at 2:32
avariant
1,81831221
1,81831221
asked Mar 22 at 22:07
UnniboyUnniboy
12
asked Mar 22 at 22:07
UnniboyUnniboy
12
asked Mar 22 at 22:07
UnniboyUnniboy
12
12
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Does this ensure that C is cmake(ed) first and then B?
No. It doesn't ensure that there even is a C nor B project, and it doesn't ensure that they will build at all. It just sources/includes (in a special way) C/CMakeLists.txt and B/CMakeLists.txt files, that's all.
add_library (C SHARED ./*c)
This is invalid, unless you have a source file named *c. You want:
file(GLOB sources ./*c)
add_library(C SHARED $sources)
The add_library doesn't understand globulations.
pkg_check_modules(C_LIB REQUIRED C)
target_link_libraries(B C_LIB)
This is strange. You don't have a pkg-config modules named "C" do you? You probably want:
target_link_libraries(B C)
or better try to always explicit tell PUBLIC or PRIVATE or INTERFACE:
target_link_libraries(B PUBLIC C)
This will ensure that B has the interface include paths that were (or will be?) added to C, and that when an executable is build that uses B, that C is linked with/against it. It does not mean "build C before B" it means: use interface of C to build B.
Maybe try it like this:
A
cmake_minimum_required(VERSION 3.14)
project(A)
add_subdirectory(C)
add_subdirectory(B)
B
cmake_minimum_required(VERSION 3.14)
project(B)
add_executable(B ./source1.c)
target_link_libraries(B PUBLIC C)
C
cmake_minimum_required(VERSION 3.14)
project(C)
add_library(C SHARED sourcec.c)
target_include_directories(C PUBLIC ./) # so when compiling B it uses this include dir
answered Mar 23 at 3:01
Kamil CukKamil Cuk
14.4k2533
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Does this ensure that C is cmake(ed) first and then B?
No. It doesn't ensure that there even is a C nor B project, and it doesn't ensure that they will build at all. It just sources/includes (in a special way) C/CMakeLists.txt and B/CMakeLists.txt files, that's all.
add_library (C SHARED ./*c)
This is invalid, unless you have a source file named *c. You want:
file(GLOB sources ./*c)
add_library(C SHARED $sources)
The add_library doesn't understand globulations.
pkg_check_modules(C_LIB REQUIRED C)
target_link_libraries(B C_LIB)
This is strange. You don't have a pkg-config modules named "C" do you? You probably want:
target_link_libraries(B C)
or better try to always explicit tell PUBLIC or PRIVATE or INTERFACE:
target_link_libraries(B PUBLIC C)
This will ensure that B has the interface include paths that were (or will be?) added to C, and that when an executable is build that uses B, that C is linked with/against it. It does not mean "build C before B" it means: use interface of C to build B.
Maybe try it like this:
A
cmake_minimum_required(VERSION 3.14)
project(A)
add_subdirectory(C)
add_subdirectory(B)
B
cmake_minimum_required(VERSION 3.14)
project(B)
add_executable(B ./source1.c)
target_link_libraries(B PUBLIC C)
C
cmake_minimum_required(VERSION 3.14)
project(C)
add_library(C SHARED sourcec.c)
target_include_directories(C PUBLIC ./) # so when compiling B it uses this include dir
answered Mar 23 at 3:01
Kamil CukKamil Cuk
14.4k2533
add a comment |
Does this ensure that C is cmake(ed) first and then B?
No. It doesn't ensure that there even is a C nor B project, and it doesn't ensure that they will build at all. It just sources/includes (in a special way) C/CMakeLists.txt and B/CMakeLists.txt files, that's all.
add_library (C SHARED ./*c)
This is invalid, unless you have a source file named *c. You want:
file(GLOB sources ./*c)
add_library(C SHARED $sources)
The add_library doesn't understand globulations.
pkg_check_modules(C_LIB REQUIRED C)
target_link_libraries(B C_LIB)
This is strange. You don't have a pkg-config modules named "C" do you? You probably want:
target_link_libraries(B C)
or better try to always explicit tell PUBLIC or PRIVATE or INTERFACE:
target_link_libraries(B PUBLIC C)
This will ensure that B has the interface include paths that were (or will be?) added to C, and that when an executable is build that uses B, that C is linked with/against it. It does not mean "build C before B" it means: use interface of C to build B.
Maybe try it like this:
A
cmake_minimum_required(VERSION 3.14)
project(A)
add_subdirectory(C)
add_subdirectory(B)
B
cmake_minimum_required(VERSION 3.14)
project(B)
add_executable(B ./source1.c)
target_link_libraries(B PUBLIC C)
C
cmake_minimum_required(VERSION 3.14)
project(C)
add_library(C SHARED sourcec.c)
target_include_directories(C PUBLIC ./) # so when compiling B it uses this include dir
answered Mar 23 at 3:01
Kamil CukKamil Cuk
14.4k2533
add a comment |
Does this ensure that C is cmake(ed) first and then B?
No. It doesn't ensure that there even is a C nor B project, and it doesn't ensure that they will build at all. It just sources/includes (in a special way) C/CMakeLists.txt and B/CMakeLists.txt files, that's all.
add_library (C SHARED ./*c)
This is invalid, unless you have a source file named *c. You want:
file(GLOB sources ./*c)
add_library(C SHARED $sources)
The add_library doesn't understand globulations.
pkg_check_modules(C_LIB REQUIRED C)
target_link_libraries(B C_LIB)
This is strange. You don't have a pkg-config modules named "C" do you? You probably want:
target_link_libraries(B C)
or better try to always explicit tell PUBLIC or PRIVATE or INTERFACE:
target_link_libraries(B PUBLIC C)
This will ensure that B has the interface include paths that were (or will be?) added to C, and that when an executable is build that uses B, that C is linked with/against it. It does not mean "build C before B" it means: use interface of C to build B.
Maybe try it like this:
A
cmake_minimum_required(VERSION 3.14)
project(A)
add_subdirectory(C)
add_subdirectory(B)
B
cmake_minimum_required(VERSION 3.14)
project(B)
add_executable(B ./source1.c)
target_link_libraries(B PUBLIC C)
C
cmake_minimum_required(VERSION 3.14)
project(C)
add_library(C SHARED sourcec.c)
target_include_directories(C PUBLIC ./) # so when compiling B it uses this include dir
answered Mar 23 at 3:01
Kamil CukKamil Cuk
14.4k2533
Does this ensure that C is cmake(ed) first and then B?
No. It doesn't ensure that there even is a C nor B project, and it doesn't ensure that they will build at all. It just sources/includes (in a special way) C/CMakeLists.txt and B/CMakeLists.txt files, that's all.
add_library (C SHARED ./*c)
This is invalid, unless you have a source file named *c. You want:
file(GLOB sources ./*c)
add_library(C SHARED $sources)
The add_library doesn't understand globulations.
pkg_check_modules(C_LIB REQUIRED C)
target_link_libraries(B C_LIB)
This is strange. You don't have a pkg-config modules named "C" do you? You probably want:
target_link_libraries(B C)
or better try to always explicit tell PUBLIC or PRIVATE or INTERFACE:
target_link_libraries(B PUBLIC C)
This will ensure that B has the interface include paths that were (or will be?) added to C, and that when an executable is build that uses B, that C is linked with/against it. It does not mean "build C before B" it means: use interface of C to build B.
Maybe try it like this:
A
cmake_minimum_required(VERSION 3.14)
project(A)
add_subdirectory(C)
add_subdirectory(B)
B
cmake_minimum_required(VERSION 3.14)
project(B)
add_executable(B ./source1.c)
target_link_libraries(B PUBLIC C)
C
cmake_minimum_required(VERSION 3.14)
project(C)
add_library(C SHARED sourcec.c)
target_include_directories(C PUBLIC ./) # so when compiling B it uses this include dir
answered Mar 23 at 3:01
Kamil CukKamil Cuk
14.4k2533
edited Mar 23 at 3:10
answered Mar 23 at 3:01
Kamil CukKamil Cuk
14.4k2533
answered Mar 23 at 3:01
Kamil CukKamil Cuk
14.4k2533
answered Mar 23 at 3:01
Kamil CukKamil Cuk
14.4k2533
14.4k2533
add a comment |
add a comment |
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