Wrap some GLIBC functions so they point to older versions

Author: jcoffland

SConstruct

@@ -111,6 +111,11 @@ if not env.GetOption('clean'):
     if env.get('static') or env.get('mostly_static'):
         conf.CBCheckLib('selinux')
 
+    if env['PLATFORM'] == 'posix':
+        funcs = 'exp expf pow powf log logf memcpy'.split()
+        flags = list(map(lambda n: '-Wl,--wrap=' + n, funcs))
+        env.AppendUnique(LINKFLAGS = flags)
+
 conf.Finish()
 
 
@@ -149,6 +154,7 @@ src = []
 subdirs = ['', 'sim', 'probe', 'opt', 'project', 'contour', 'render']
 for subdir in subdirs: src += Glob('src/camotics/%s/*.cpp' % subdir)
 if env['with_tpl']: src += Glob('src/tplang/*.cpp')
+src += ['src/glibc.c']
 
 src = list(map(lambda path: re.sub(r'^src/', 'build/', str(path)), src))
 

buildbot/workers/debian-stable-64bit/README.md

@@ -1,13 +1,20 @@
-## Install packages
+## Create and Enter chroot
+
+    sudo debootstrap --arch amd64 stable root
+    sudo chroot root /bin/bash
 
-    sudo apt-get update
-    sudo apt-get install -y wget git scons build-essential binutils-dev \
-      fakeroot python3-pip python3-virtualenv debian-keyring \
-      debian-archive-keyring ca-certificates libssl-dev
+## Install packages
 
-## Install systemd service
+    apt-get update
+    apt-get install -y wget git scons build-essential binutils-dev fakeroot \
+      python3-pip debian-keyring debian-archive-keyring ca-certificates git \
+      libssl-dev buildbot-worker python-six libqt5websockets5-dev \
+      libqt5opengl5-dev libnode-dev libglu1-mesa-dev pkgconf qttools5-dev-tools
 
-Install ``buildbot-worker.service`` on worker, then:
+## Install and Start Worker
 
-    cd /home/admin/worker
-    sudo systemctl enable --now $PWD/buildbot-worker.service
+    mkdir /opt/worker
+    cd /opt/worker
+    buildbot-worker create-worker . localhost:8012 debian-stable-64bit \
+      <password>
+    buildbot-worker start

buildbot/workers/debian-stable-64bit/build.json

@@ -1,6 +1,10 @@
 {
   "props": {"os": "lin"},
 
+  "env": {
+    "QT5DIR": "/usr"
+  },
+
   "builds": {
     "camotics": {"projects": ["camotics"]}
   }

buildbot/workers/debian-stable-64bit/buildbot-worker.service

@@ -1,12 +1,11 @@
 [Unit]
-Description=F@H Build Worker
+Description=Build Worker
 After=network.target
 
 [Service]
 User=admin
-WorkingDirectory=/home/admin/worker
-Environment=PATH=/home/admin/worker/bin:/usr/local/bin:/usr/bin:/bin
-ExecStart=python3 bin/buildbot-worker start --nodaemon %I
+WorkingDirectory=/opt/worker
+ExecStart=buildbot-worker start --nodaemon %I
 Restart=always
 RestartSec=4
 

src/glibc.c

@@ -0,0 +1,52 @@
+/******************************************************************************\
+
+  CAMotics is an Open-Source simulation and CAM software.
+  Copyright (C) 2011-2022 Joseph Coffland <[email protected]>
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+\******************************************************************************/
+
+#if defined(__GNUC__) && !defined(__clang__) && !defined(_WIN32)
+
+#include <string.h>
+#include <math.h>
+
+#if defined(__aarch64__)
+#define GLIBC_SYMVER "2.17"
+#else
+#define GLIBC_SYMVER "2.2.5"
+#endif
+
+__asm__(".symver exp,exp@GLIBC_"       GLIBC_SYMVER);
+__asm__(".symver expf,expf@GLIBC_"     GLIBC_SYMVER);
+__asm__(".symver log,log@GLIBC_"       GLIBC_SYMVER);
+__asm__(".symver logf,logf@GLIBC_"     GLIBC_SYMVER);
+__asm__(".symver pow,pow@GLIBC_"       GLIBC_SYMVER);
+__asm__(".symver powf,powf@GLIBC_"     GLIBC_SYMVER);
+__asm__(".symver memcpy,memcpy@GLIBC_" GLIBC_SYMVER);
+
+float  __wrap_logf(float x)           {return logf(x);}
+double __wrap_log(double x)           {return log (x);}
+float  __wrap_expf(float x)           {return expf(x);}
+double __wrap_exp(double x)           {return exp (x);}
+float  __wrap_powf(float x, float  y) {return powf(x, y);}
+double __wrap_pow(double x, double y) {return pow (x, y);}
+
+
+void *__wrap_memcpy(void *restrict dst, const void *restrict src, size_t n) {
+  return memcpy(dst, src, n);
+}
+
+#endif