nginx-module-opentracing: enabled building on RHEL/CentOS 7.

contrib/src/jaeger-client-cpp/CMakeLists.txt.suppress-gcc-version-check.patch

diff --git a/contrib/src/jaeger-client-cpp/CMakeLists.txt.suppress-gcc-version-check.patch b/contrib/src/jaeger-client-cpp/CMakeLists.txt.suppress-gcc-version-check.patch
new file mode 100644
index 0000000..b7b99b7
--- /dev/null
+++ b/contrib/src/jaeger-client-cpp/CMakeLists.txt.suppress-gcc-version-check.patch
@@ -0,0 +1,17 @@
+--- a/CMakeLists.txt	2021-03-22 09:00:52.327615463 +0000
++++ b/CMakeLists.txt	2021-03-22 09:01:09.287806286 +0000
+@@ -54,10 +54,10 @@
+ 

+ set(package_deps)

+ 

+-if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND

+-   CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.9")

+-  message(FATAL_ERROR "Must use gcc >= 4.9")

+-endif()

++#if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND

++#   CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.9")

++#  message(FATAL_ERROR "Must use gcc >= 4.9")

++#endif()

+ 

+ #hunter_add_package(thrift)

+ #find_package(thrift ${hunter_config} REQUIRED)

contrib/src/jaeger-client-cpp/Makefile

diff --git a/contrib/src/jaeger-client-cpp/Makefile b/contrib/src/jaeger-client-cpp/Makefile
index eac9cc0..f83773e 100644
--- a/contrib/src/jaeger-client-cpp/Makefile
+++ b/contrib/src/jaeger-client-cpp/Makefile
@@ -13,6 +13,11 @@
 jaeger-client-cpp: jaeger-client-cpp-$(JAEGER_CLIENT_CPP_VERSION).tar.gz .sum-jaeger-client-cpp
 	$(UNPACK)
 	$(APPLY) $(SRC)/jaeger-client-cpp/CMakeLists.txt.patch
+ifeq ($(shell rpm --version 2>&1 || echo FAIL),)
+ifeq ($(shell test `rpm --eval '0%{?rhel}'` -gt 0 -a `rpm --eval '0%{?rhel}'` -lt 8 && echo 1),1)
+	$(APPLY) $(SRC)/jaeger-client-cpp/CMakeLists.txt.suppress-gcc-version-check.patch
+endif
+endif
 	$(MOVE)
 
 DEPS_jaeger-client-cpp = opentracing-cpp $(DEPS_opentracing-cpp) thrift $(DEPS_thrift)

rpm/SPECS/Makefile.module-opentracing

diff --git a/rpm/SPECS/Makefile.module-opentracing b/rpm/SPECS/Makefile.module-opentracing
index 0c88f02..4fbc070 100644
--- a/rpm/SPECS/Makefile.module-opentracing
+++ b/rpm/SPECS/Makefile.module-opentracing
@@ -24,6 +24,10 @@
 				$(CONTRIB)/src/thrift/build-cmake-ThriftMacros.cmake.patch \
 				$(CONTRIB)/src/thrift/lib-cpp-CMakeLists.txt.patch
 
+ifeq ($(shell test `rpm --eval '0%{?rhel}'` -gt 0 -a `rpm --eval '0%{?rhel}'` -lt 8 && echo 1),1)
+MODULE_PATCHES_opentracing+=	$(CONTRIB)/src/jaeger-client-cpp/CMakeLists.txt.suppress-gcc-version-check.patch
+endif
+
 MODULE_CONFARGS_opentracing=	--add-dynamic-module=nginx-opentracing-$(NGINX_OPENTRACING_VERSION)/opentracing
 
 .deps-module-opentracing:
@@ -49,7 +53,7 @@
 BuildRequires: cmake
 %define _cmake_cmd %{__cmake}
 %endif
-%if (0%{?rhel} >= 8) || (0%{?fedora} > 0)
+%if (0%{?rhel} >= 7) || (0%{?fedora} > 0)
 BuildRequires: libstdc++-static
 %endif
 BuildRequires: yaml-cpp-devel