Disable usage of sys_siglist function to workaround issues on alpine (#…

…854)

Motivation:

When we try to use our static compiled version on alpine it fails due
missing sys_siglist. We can workaround this by letting apr use its own
implementation.

Modifications:

Use ac_cv_have_decl_sys_siglist=no when compiling APR.

Result:

netty-tcnative-boringssl-static should be useable on alpine. Fixes
#853

docker/Dockerfile.centos6

@@ -30,6 +30,7 @@ RUN yum install -y \
  tar \
  unzip \
  wget \
+ which \
  zip
 
 RUN mkdir $SOURCE_DIR

docker/Dockerfile.cross_compile_aarch64

@@ -18,7 +18,7 @@ RUN yum install -y http://opensource.wandisco.com/centos/6/git/x86_64/wandisco-g
 # Install requirements
 RUN  set -x && \
   yum -y install epel-release && \
-  yum -y install wget tar git make autoconf automake libtool openssl-devel ninja-build gcc-c++ patch unzip zip
+  yum -y install wget tar git make autoconf automake libtool openssl-devel ninja-build gcc-c++ patch unzip zip which
 
 # Install Java
 RUN yum install -y java-1.8.0-openjdk-devel golang
@@ -39,7 +39,7 @@ RUN set -x && \
   wget --no-check-certificate https://downloads.apache.org//apr/apr-$APR_VERSION.tar.gz && \
   tar xvf apr-$APR_VERSION.tar.gz && \
   pushd apr-$APR_VERSION && \
-  CC=aarch64-none-linux-gnu-gcc CFLAGS='-O3 -fno-omit-frame-pointer -fPIC' ./configure --disable-shared --prefix=/opt/apr-$APR_VERSION-static --host=aarch64-none-linux-gnu ac_cv_file__dev_zero=yes ac_cv_func_setpgrp_void=yes apr_cv_tcp_nodelay_with_cork=yes ac_cv_sizeof_struct_iovec=8 && \
+  CC=aarch64-none-linux-gnu-gcc CFLAGS='-O3 -fno-omit-frame-pointer -fPIC ' ./configure --disable-shared --prefix=/opt/apr-$APR_VERSION-static --host=aarch64-none-linux-gnu ac_cv_have_decl_sys_siglist=no ac_cv_file__dev_zero=yes ac_cv_func_setpgrp_void=yes apr_cv_tcp_nodelay_with_cork=yes ac_cv_sizeof_struct_iovec=8 && \
   make || true && \
   pushd tools && \
   gcc -Wall -O2 -DCROSS_COMPILE gen_test_char.c -s -o gen_test_char && \
@@ -52,7 +52,7 @@ RUN set -x && \
   wget --no-check-certificate https://downloads.apache.org//apr/apr-$APR_VERSION.tar.gz && \
   tar xvf apr-$APR_VERSION.tar.gz && \
   pushd apr-$APR_VERSION && \
-  CC=aarch64-none-linux-gnu-gcc CFLAGS='-O3 -fno-omit-frame-pointer -fPIC' ./configure --prefix=/opt/apr-$APR_VERSION-share --host=aarch64-none-linux-gnu ac_cv_file__dev_zero=yes ac_cv_func_setpgrp_void=yes apr_cv_tcp_nodelay_with_cork=yes ac_cv_sizeof_struct_iovec=8 && \
+  CC=aarch64-none-linux-gnu-gcc CFLAGS='-O3 -fno-omit-frame-pointer -fPIC' ./configure --prefix=/opt/apr-$APR_VERSION-share --host=aarch64-none-linux-gnu ac_cv_have_decl_sys_siglist=no ac_cv_file__dev_zero=yes ac_cv_func_setpgrp_void=yes apr_cv_tcp_nodelay_with_cork=yes ac_cv_sizeof_struct_iovec=8 && \
   make || true && \
   pushd tools && \
   gcc -Wall -O2 -DCROSS_COMPILE gen_test_char.c -s -o gen_test_char && \

pom.xml

@@ -663,6 +663,7 @@
                         <mkdir dir="${aprHome}" />
                         <echo message="Patching APR to not link against libcrypt" />
                         <patch patchfile="../patches/apr_crypt.patch" strip="0" dir="${aprSourceDir}" />
+
                         <exec executable="buildconf" failonerror="true" dir="${aprSourceDir}" resolveexecutable="true" />
 
                         <if>
@@ -673,7 +674,7 @@
 +                             See https://stackoverflow.com/a/1605497/1074097
 +                           -->
                             <exec executable="configure" failonerror="true" dir="${aprSourceDir}" resolveexecutable="true">
-                              <arg line="--disable-shared --prefix=${aprHome} CFLAGS='-O3 -fno-omit-frame-pointer -fPIC -target arm64-apple-macos11' --host=aarch64-apple-darwin ${macOsxDeploymentTarget} ac_cv_file__dev_zero=yes apr_cv_process_shared_works=yes apr_cv_mutex_robust_shared=no apr_cv_tcp_nodelay_with_cork=yes ${macOsxDeploymentTarget}" />
+                              <arg line="--disable-shared --prefix=${aprHome} CFLAGS='-O3 -fno-omit-frame-pointer -fPIC -target arm64-apple-macos11' --host=aarch64-apple-darwin ${macOsxDeploymentTarget} ac_cv_have_decl_sys_siglist=no ac_cv_file__dev_zero=yes apr_cv_process_shared_works=yes apr_cv_mutex_robust_shared=no apr_cv_tcp_nodelay_with_cork=yes" />
                             </exec>
                             <!--
                               Make will fail when it tries to use the gen_test_char program.
@@ -692,15 +693,18 @@
                           </then>
                           <else>
                             <exec executable="configure" failonerror="true" dir="${aprSourceDir}" resolveexecutable="true">
-                              <arg line="--disable-shared --prefix=${aprHome} CFLAGS='-O3 -fno-omit-frame-pointer -fPIC' ${macOsxDeploymentTarget}" />
+                              <!--
+                                Disable the detection of sys_siglist and just use apr's own implementation to workaround problems when trying to use static jars on alpine linux
+                                See https://github.com/netty/netty-tcnative/issues/853
+                              -->
+                              <arg line="--disable-shared --prefix=${aprHome} CFLAGS='-O3 -fno-omit-frame-pointer -fPIC' ${macOsxDeploymentTarget} ac_cv_have_decl_sys_siglist=no" />
                             </exec>
                             <exec executable="make" failonerror="true" dir="${aprSourceDir}" resolveexecutable="true" />
                             <exec executable="make" failonerror="true" dir="${aprSourceDir}" resolveexecutable="true">
                               <arg line="install" />
                             </exec>
                           </else>
                         </if>
-
                       </else>
                     </if>
                   </target>