* [Buildroot] [PATCH v2 2/2] package/drogon: new package
2025-11-09 10:17 [Buildroot] [PATCH v2 1/2] package/jsoncpp: add host variant Dario Binacchi
@ 2025-11-09 10:17 ` Dario Binacchi
2026-01-01 13:41 ` Thomas Petazzoni via buildroot
0 siblings, 1 reply; 3+ messages in thread
From: Dario Binacchi @ 2025-11-09 10:17 UTC (permalink / raw)
To: buildroot; +Cc: Bernd Kuhls, Dario Binacchi, Eric Le Bihan
Drogon is a C++17/20 based HTTP application framework. It can be used to
easily build various types of web application server programs using C++.
Project page: https://github.com/drogonframework/drogon
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---
Changes v1 -> v2:
- Drop BR2_ARCH_IS_64 dependency. It has been tested on imx6ull platform.
- Add DROGON_INSTALL_STAGING
- Add 0004-Fix-building-error-for-Werror-unused-value.patch for trantor
submodule.
DEVELOPERS | 1 +
package/Config.in | 1 +
package/Config.in.host | 1 +
...e-fix-cross-compiling-for-drogon_ctl.patch | 81 +++++++++++++++++++
...l-executables-to-bin-to-avoid-build-.patch | 47 +++++++++++
...ples-install-the-example-executables.patch | 31 +++++++
...ilding-error-for-Werror-unused-value.patch | 42 ++++++++++
package/drogon/Config.in | 40 +++++++++
package/drogon/Config.in.host | 20 +++++
package/drogon/drogon.mk | 62 ++++++++++++++
10 files changed, 326 insertions(+)
create mode 100644 package/drogon/0001-cmake-fix-cross-compiling-for-drogon_ctl.patch
create mode 100644 package/drogon/0002-examples-move-all-executables-to-bin-to-avoid-build-.patch
create mode 100644 package/drogon/0003-examples-install-the-example-executables.patch
create mode 100644 package/drogon/0004-Fix-building-error-for-Werror-unused-value.patch
create mode 100644 package/drogon/Config.in
create mode 100644 package/drogon/Config.in.host
create mode 100644 package/drogon/drogon.mk
diff --git a/DEVELOPERS b/DEVELOPERS
index b14c6e3875ec..3a1e2d10fea5 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -808,6 +808,7 @@ F: package/babeld/
F: package/bc/
F: package/cmocka/
F: package/connman/
+F: package/drogon/
F: package/empty/
F: package/iana-assignments/
F: package/inih/
diff --git a/package/Config.in b/package/Config.in
index 930f3680582a..f9b6c89f5e6e 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -2024,6 +2024,7 @@ menu "Networking"
source "package/davici/Config.in"
source "package/dht/Config.in"
source "package/dpdk/Config.in"
+ source "package/drogon/Config.in"
source "package/enet/Config.in"
source "package/filemq/Config.in"
source "package/fmlib/Config.in"
diff --git a/package/Config.in.host b/package/Config.in.host
index d0088364d07a..bdf7d40d8897 100644
--- a/package/Config.in.host
+++ b/package/Config.in.host
@@ -30,6 +30,7 @@ menu "Host utilities"
source "package/dosfstools/Config.in.host"
source "package/doxygen/Config.in.host"
source "package/dracut/Config.in.host"
+ source "package/drogon/Config.in.host"
source "package/dtc/Config.in.host"
source "package/e2fsprogs/Config.in.host"
source "package/e2tools/Config.in.host"
diff --git a/package/drogon/0001-cmake-fix-cross-compiling-for-drogon_ctl.patch b/package/drogon/0001-cmake-fix-cross-compiling-for-drogon_ctl.patch
new file mode 100644
index 000000000000..70ec298cf5b8
--- /dev/null
+++ b/package/drogon/0001-cmake-fix-cross-compiling-for-drogon_ctl.patch
@@ -0,0 +1,81 @@
+From 3eda90ee8f46a9f309bf27e7faaf7f2dea1a7fde Mon Sep 17 00:00:00 2001
+From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+Date: Tue, 23 Sep 2025 11:37:59 +0200
+Subject: [PATCH] cmake: fix cross-compiling for drogon_ctl
+
+Fix the the following errors raised by building drogon in Buildroot:
+
+[ 70%] Generating filter_cc.h, filter_cc.cc
+cd ~/buildroot/output/build/drogon-v1.9.11/drogon_ctl && ./_drogon_ctl create view ~/buildroot/output/build/drogon-v1.9.11/drogon_ctl/templates/config_yaml.csp
+cd ~/buildroot/output/build/drogon-v1.9.11/drogon_ctl && ./_drogon_ctl create view ~/buildroot/output/build/drogon-v1.9.11/drogon_ctl/templates/demoMain.csp
+cd ~/buildroot/output/build/drogon-v1.9.11/drogon_ctl && ./_drogon_ctl create view ~/buildroot/output/build/drogon-v1.9.11/drogon_ctl/templates/filter_cc.csp
+[ 71%] Generating test_main.h, test_main.cc
+cd ~/buildroot/output/build/drogon-v1.9.11/drogon_ctl && ./_drogon_ctl create view ~/buildroot/output/build/drogon-v1.9.11/drogon_ctl/templates/cmake.csp
+/bin/sh: 1: ./_drogon_ctl: Exec format error
+/bin/sh: 1: ./_drogon_ctl: Exec format error
+make[4]: *** [drogon_ctl/CMakeFiles/drogon_ctl.dir/build.make:88: drogon_ctl/config_yaml.h] Error 126
+make[4]: *** Waiting for unfinished jobs....
+make[4]: *** [drogon_ctl/CMakeFiles/drogon_ctl.dir/build.make:95: drogon_ctl/demoMain.h] Error 126
+/bin/sh: 1: ./_drogon_ctl: Exec format error
+make[4]: *** [drogon_ctl/CMakeFiles/drogon_ctl.dir/build.make:102: drogon_ctl/filter_cc.h] Error 126
+/bin/sh: 1: ./_drogon_ctl: Exec format error
+make[4]: *** [drogon_ctl/CMakeFiles/drogon_ctl.dir/build.make:74: drogon_ctl/cmake.h] Error 126
+
+When building drogon_ctl during cross-compilation, the host version of
+_drogon_ctl must be used to generate output files, since the target
+binary cannot run on the host.
+
+The change ensures that drogon_ctl builds correctly both for native and
+cross-compiling environments.
+
+Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+Upstream: https://github.com/drogonframework/drogon/pull/2389/commits/3eda90ee8f46a9f309bf27e7faaf7f2dea1a7fde
+---
+ CMakeLists.txt | 9 +++++++++
+ drogon_ctl/CMakeLists.txt | 3 ++-
+ 2 files changed, 11 insertions(+), 1 deletion(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 9cbc6d732a33..7cf091e90ef7 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -524,6 +524,15 @@ if (BUILD_EXAMPLES)
+ endif (BUILD_EXAMPLES)
+
+ if (BUILD_CTL)
++ if (CMAKE_CROSSCOMPILING)
++ find_program(HOST_DROGON_CTL _drogon_ctl)
++ if (NOT HOST_DROGON_CTL)
++ message(FATAL_ERROR "_drogon_ctl not found on host system")
++ endif()
++ set(DROGON_CTL "${HOST_DROGON_CTL}")
++ else (CMAKE_CROSSCOMPILING)
++ set(DROGON_CTL "$<TARGET_FILE:_drogon_ctl>")
++ endif (CMAKE_CROSSCOMPILING)
+ add_subdirectory(drogon_ctl)
+ endif (BUILD_CTL)
+
+diff --git a/drogon_ctl/CMakeLists.txt b/drogon_ctl/CMakeLists.txt
+index 04b790d3741b..f6b12bddab60 100755
+--- a/drogon_ctl/CMakeLists.txt
++++ b/drogon_ctl/CMakeLists.txt
+@@ -43,7 +43,7 @@ foreach(cspFile ${SCP_LIST})
+ get_filename_component(classname ${cspFile} NAME_WE)
+ message(STATUS "view classname:" ${classname})
+ add_custom_command(OUTPUT ${classname}.h ${classname}.cc
+- COMMAND $<TARGET_FILE:_drogon_ctl>
++ COMMAND ${DROGON_CTL}
+ ARGS
+ create
+ view
+@@ -63,6 +63,7 @@ if(APPLE)
+ target_link_libraries(drogon_ctl PRIVATE resolv)
+ endif()
+ message(STATUS "bin:" ${INSTALL_BIN_DIR})
++install(TARGETS _drogon_ctl RUNTIME DESTINATION ${INSTALL_BIN_DIR})
+ install(TARGETS drogon_ctl RUNTIME DESTINATION ${INSTALL_BIN_DIR})
+ if(WIN32)
+ set(CTL_FILE $<TARGET_FILE:drogon_ctl>)
+--
+2.43.0
+
diff --git a/package/drogon/0002-examples-move-all-executables-to-bin-to-avoid-build-.patch b/package/drogon/0002-examples-move-all-executables-to-bin-to-avoid-build-.patch
new file mode 100644
index 000000000000..a6621195f902
--- /dev/null
+++ b/package/drogon/0002-examples-move-all-executables-to-bin-to-avoid-build-.patch
@@ -0,0 +1,47 @@
+From 77a8e3c91494ae094b5b1b18594ffaec11d37310 Mon Sep 17 00:00:00 2001
+From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+Date: Tue, 23 Sep 2025 17:15:56 +0200
+Subject: [PATCH] examples: move all executables to bin/ to avoid build
+ conflicts
+
+Example executables were previously created in the same folder as their
+source directories. This caused the following errors when building
+drogon in Buildroot:
+
+[ 82%] Linking CXX executable helloworld
+cd ~/buildroot/output/build/drogon-custom/examples && /usr/bin/cmake -E cmake_link_script CMakeFiles/helloworld.dir/link.txt --verbose=1
+~/buildroot/output/host/bin/aarch64-buildroot-linux-gnu-g++ --sysroot=~/buildroot/output/host/aarch64-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -g0 -D_FORTIFY_SOURCE=1 -DNDEBUG CMakeFiles/helloworld.dir/helloworld/main.cc.o CMakeFiles/helloworld.dir/helloworld/HelloController.cc.o CMakeFiles/helloworld.dir/helloworld/HelloViewController.cc.o CMakeFiles/helloworld.dir/HelloView.cc.o -o helloworld -Wl,-rpath,~/buildroot/output/build/drogon-custom:~/buildroot/output/build/drogon-custom/trantor ../libdrogon.so.1.9.11 ../trantor/libtrantor.so.1.5.24 ~/buildroot/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/lib/libjsoncpp.so
+~/buildroot/output/host/lib/gcc/aarch64-buildroot-linux-gnu/13.4.0/../../../../aarch64-buildroot-linux-gnu/bin/ld: cannot open output file helloworld: Is a directory
+collect2: error: ld returned 1 exit status
+make[4]: *** [examples/CMakeFiles/helloworld.dir/build.make:155: examples/helloworld] Error 1
+make[3]: *** [CMakeFiles/Makefile2:385: examples/CMakeFiles/helloworld.dir/all] Error 2
+
+Move all example applications to a dedicated RUNTIME_OUTPUT_DIRECTORY
+(build/examples/bin) to avoid conflicts between source directories
+and generated binaries.
+
+Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+Upstream: https://github.com/drogonframework/drogon/pull/2389/commits/77a8e3c91494ae094b5b1b18594ffaec11d37310
+---
+ examples/CMakeLists.txt | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
+index dca122f424ba..9d4b91d37034 100755
+--- a/examples/CMakeLists.txt
++++ b/examples/CMakeLists.txt
+@@ -50,6 +50,11 @@ set(example_targets
+ async_stream
+ cors)
+
++foreach(target ${example_targets})
++ set_target_properties(${target} PROPERTIES
++ RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/bin)
++endforeach()
++
+ # Add warnings for our example targets--some warnings (such as -Wunused-parameter) only appear
+ # when the templated functions are instantiated at their point of use.
+ if(NOT ${CMAKE_PLATFORM_NAME} STREQUAL "Windows" AND CMAKE_CXX_COMPILER_ID MATCHES GNU)
+--
+2.43.0
+
diff --git a/package/drogon/0003-examples-install-the-example-executables.patch b/package/drogon/0003-examples-install-the-example-executables.patch
new file mode 100644
index 000000000000..e8e7383d2ab1
--- /dev/null
+++ b/package/drogon/0003-examples-install-the-example-executables.patch
@@ -0,0 +1,31 @@
+From 535892bf6958c8d5619251ead204ada0002a8674 Mon Sep 17 00:00:00 2001
+From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+Date: Tue, 23 Sep 2025 17:21:28 +0200
+Subject: [PATCH] examples: install the example executables
+
+This allows the examples to be used on the target system without
+manually copying them, improving usability.
+
+Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+Upstream: https://github.com/drogonframework/drogon/pull/2389/commits/535892bf6958c8d5619251ead204ada0002a8674
+---
+ examples/CMakeLists.txt | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
+index 9d4b91d37034..61e65d8323aa 100755
+--- a/examples/CMakeLists.txt
++++ b/examples/CMakeLists.txt
+@@ -55,6 +55,9 @@ foreach(target ${example_targets})
+ RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/bin)
+ endforeach()
+
++install(TARGETS ${example_targets}
++ RUNTIME DESTINATION ${INSTALL_BIN_DIR})
++
+ # Add warnings for our example targets--some warnings (such as -Wunused-parameter) only appear
+ # when the templated functions are instantiated at their point of use.
+ if(NOT ${CMAKE_PLATFORM_NAME} STREQUAL "Windows" AND CMAKE_CXX_COMPILER_ID MATCHES GNU)
+--
+2.43.0
+
diff --git a/package/drogon/0004-Fix-building-error-for-Werror-unused-value.patch b/package/drogon/0004-Fix-building-error-for-Werror-unused-value.patch
new file mode 100644
index 000000000000..ea2393294b01
--- /dev/null
+++ b/package/drogon/0004-Fix-building-error-for-Werror-unused-value.patch
@@ -0,0 +1,42 @@
+From 7134f2f8e07b89450dd2407e7a21a7b9cea6b192 Mon Sep 17 00:00:00 2001
+From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+Date: Sat, 8 Nov 2025 19:39:01 +0100
+Subject: [PATCH] Fix building error for -Werror=unused-value
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Compiling trantor in Buildroot raises the following error:
+
+In file included from output/host/include/openssl/ssl.h:30,
+ from output/build/host-drogon-v1.9.11/trantor/trantor/net/inner/tlsprovider/OpenSSLProvider.cc:6:
+build/host-drogon-v1.9.11/trantor/trantor/net/inner/tlsprovider/OpenSSLProvider.cc: In member function ‘ssize_t OpenSSLProvider::sendTLSData()’:
+output/host/include/openssl/bio.h:629:34: error: value computed is not used [-Werror=unused-value]
+ 629 | # define BIO_reset(b) (int)BIO_ctrl(b,BIO_CTRL_RESET,0,NULL)
+ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+output/build/host-drogon-v1.9.11/trantor/trantor/net/inner/tlsprovider/OpenSSLProvider.cc:777:9: note: in expansion of macro ‘BIO_reset’
+ 777 | BIO_reset(wbio_);
+ | ^~~~~~~~~
+
+Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+Upstream: https://github.com/an-tao/trantor/pull/380
+---
+ trantor/trantor/net/inner/tlsprovider/OpenSSLProvider.cc | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/trantor/trantor/net/inner/tlsprovider/OpenSSLProvider.cc b/trantor/trantor/net/inner/tlsprovider/OpenSSLProvider.cc
+index f91e9cde75bd..787cbc405436 100644
+--- a/trantor/trantor/net/inner/tlsprovider/OpenSSLProvider.cc
++++ b/trantor/trantor/net/inner/tlsprovider/OpenSSLProvider.cc
+@@ -774,7 +774,7 @@ struct OpenSSLProvider : public TLSProvider, public NonCopyable
+ {
+ appendToWriteBuffer((char *)data + n, len - n);
+ }
+- BIO_reset(wbio_);
++ (void)BIO_reset(wbio_);
+ if (n < 0)
+ return -1;
+ return len;
+--
+2.43.0
+
diff --git a/package/drogon/Config.in b/package/drogon/Config.in
new file mode 100644
index 000000000000..0db4258e309e
--- /dev/null
+++ b/package/drogon/Config.in
@@ -0,0 +1,40 @@
+config BR2_PACKAGE_DROGON
+ bool "drogon"
+ depends on BR2_INSTALL_LIBSTDCPP
+ depends on BR2_TOOLCHAIN_GCC_AT_LEAST_11 # C++17/20
+ depends on BR2_TOOLCHAIN_HAS_THREADS
+ select BR2_PACKAGE_JSONCPP
+ select BR2_PACKAGE_UTIL_LINUX
+ select BR2_PACKAGE_UTIL_LINUX_LIBUUID
+ select BR2_PACKAGE_ZLIB
+ help
+ Drogon is a C++17/20 based HTTP application framework.
+ Drogon can be used to easily build various types of web
+ application server programs using C++.
+
+ https://github.com/drogonframework/drogon
+
+if BR2_PACKAGE_DROGON
+
+config BR2_PACKAGE_DROGON_BROTLI
+ bool "build Brotli"
+
+config BR2_PACKAGE_DROGON_CTL
+ bool "build drogon_ctl"
+ select BR2_PACKAGE_HOST_DROGON
+
+config BR2_PACKAGE_DROGON_EXAMPLES
+ bool "build examples"
+
+config BR2_PACKAGE_DROGON_ORM
+ bool "build orm"
+
+config BR2_PACKAGE_DROGON_YAML_CONFIG
+ bool "build yaml config"
+
+endif
+
+comment "drogon needs a toolchain w/ C++, threads, gcc >= 11"
+ depends on !BR2_INSTALL_LIBSTDCPP || \
+ !BR2_TOOLCHAIN_GCC_AT_LEAST_11 || \
+ !BR2_TOOLCHAIN_HAS_THREADS
diff --git a/package/drogon/Config.in.host b/package/drogon/Config.in.host
new file mode 100644
index 000000000000..b3b691e2cfe2
--- /dev/null
+++ b/package/drogon/Config.in.host
@@ -0,0 +1,20 @@
+config BR2_PACKAGE_HOST_DROGON
+ bool "drogon"
+ depends on BR2_HOST_INSTALL_LIBSTDCPP
+ depends on BR2_HOST_TOOLCHAIN_GCC_AT_LEAST_11 # C++17/20
+ depends on BR2_HOST_TOOLCHAIN_HAS_THREADS
+ select BR2_HOST_PACKAGE_JSONCPP
+ select BR2_HOST_PACKAGE_UTIL_LINUX
+ select BR2_HOST_PACKAGE_UTIL_LINUX_LIBUUID
+ select BR2_HOST_PACKAGE_ZLIB
+ help
+ Drogon is a C++17/20 based HTTP application framework.
+ Drogon can be used to easily build various types of web
+ application server programs using C++.
+
+ https://github.com/drogonframework/drogon
+
+comment "drogon needs a toolchain w/ C++, threads, gcc >= 11"
+ depends on !BR2_HOST_INSTALL_LIBSTDCPP || \
+ !BR2_HOST_TOOLCHAIN_GCC_AT_LEAST_11 || \
+ !BR2_HOST_TOOLCHAIN_HAS_THREADS
diff --git a/package/drogon/drogon.mk b/package/drogon/drogon.mk
new file mode 100644
index 000000000000..64ad08f4ab42
--- /dev/null
+++ b/package/drogon/drogon.mk
@@ -0,0 +1,62 @@
+################################################################################
+#
+# drogon
+#
+################################################################################
+
+DROGON_VERSION = v1.9.11
+# DROGON_SITE = $(call github,drogonframework,drogon,v$(DROGON_VERSION))
+DROGON_SITE = https://github.com/drogonframework/drogon
+DROGON_SITE_METHOD = git
+DROGON_GIT_SUBMODULES = YES
+DROGON_LICENSE = MIT
+DROGON_LICENSE_FILES = LICENSE
+DROGON_INSTALL_STAGING = YES
+
+DROGON_DEPENDENCIES = jsoncpp util-linux zlib
+HOST_DROGON_DEPENDENCIES = host-jsoncpp host-util-linux host-zlib
+
+DROGON_CONF_OPTS = \
+ -DBUILD_TESTS=OFF
+
+HOST_DROGON_CONF_OPTS = \
+ -DBUILD_TESTS=OFF \
+ -DBUILD_EXAMPLES=OFF
+
+ifeq ($(BR2_PACKAGE_DROGON_BROTLI),y)
+DROGON_CONF_OPTS += -DBUILD_BROTLI=ON
+else
+DROGON_CONF_OPTS += -DBUILD_BROTLI=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_DROGON_CTL),y)
+# When we have drogon_ctl for the target, we need to build the
+# _drogon_ctl tool with host-drogon support so that it can be
+# run during the building process
+DROGON_DEPENDENCIES += host-drogon
+DROGON_CONF_OPTS += -DBUILD_CTL=ON
+HOST_DROGON_CONF_OPTS += -DBUILD_CTL=ON
+else
+DROGON_CONF_OPTS += -DBUILD_CTL=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_DROGON_EXAMPLES),y)
+DROGON_CONF_OPTS += -DBUILD_EXAMPLES=ON
+else
+DROGON_CONF_OPTS += -DBUILD_EXMPLES=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_DROGON_ORM),y)
+DROGON_CONF_OPTS += -DBUILD_ORM=ON
+else
+DROGON_CONF_OPTS += -DBUILD_ORM=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_DROGON_YAML_CONFIG),y)
+DROGON_CONF_OPTS += -DBUILD_YAML_CONFIG=ON
+else
+DROGON_CONF_OPTS += -DBUILD_YAML_CONFIG=OFF
+endif
+
+$(eval $(cmake-package))
+$(eval $(host-cmake-package))
--
2.43.0
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