[Plplot-devel] executable stacks

[Orion P. <or...@nw...>]

Fedora has now started generating errors when code generates an 
executable stack.  This breaks the plplot build:

[ 75%] Linking Fortran executable x09f
cd 
/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/examples/fortran 
&& /usr/bin/cmake -E cmake_link_script CMakeFiles/x09f.dir/link.txt 
--verbose=1
/usr/bin/gfortran -Wl,-z,relro -Wl,--as-needed 
-Wl,-z,pack-relative-relocs -Wl,-z,now 
-specs=/usr/lib/rpm/redhat/redhat-hardened-ld-errors 
-specs=/usr/lib/rpm/redhat/redhat-hardened-ld 
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -Wl,--build-id=sha1 -O2 
-flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe 
-Wall -Wno-complain-wrong-lang -Werror=format-security 
-Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS 
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong 
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 
-mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection 
-fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer 
-mno-omit-leaf-frame-pointer CMakeFiles/x09f.dir/x09f.f90.o -o x09f 
-Wl,-rpath,/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/bindings/fortran:/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/src:/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/lib/csa:/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/lib/nn:/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/lib/qsastime 
../libplfortrandemolib.a 
../../bindings/fortran/libplplotfortran.so.0.2.0 
-Wl,-rpath-link,/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/src:/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/lib/csa:/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/lib/nn:/builddir/build/BUILD/plplot-5.15.0/redhat-linux-build/lib/qsastime 

/usr/bin/ld: error: /tmp/cczNXqc0.ltrans0.ltrans.o: is triggering the 
generation of an executable stack (because it has an executable 
.note.GNU-stack section)

Using -Wtrampolines yields:

plplot-5.15.0/examples/fortran/x09f.f90:187:21: warning: trampoline 
generated for nested function ‘mypltr.3’ [-Wtrampolines]
plplot-5.15.0/examples/fortran/x09f.f90:187:21: warning: trampoline 
generated for nested function ‘mypltr’ [-Wtrampolines]

and:

/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xtraditional09a.adb:92:5: 
warning: trampoline generated for nested function 
‘xtraditional09a.mypltr’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xstandard09a.adb:92:5: 
warning: trampoline generated for nested function ‘xstandard09a.mypltr’ 
[-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xtraditional14a.adb:258:9: 
warning: trampoline generated for nested function 
‘xtraditional14a.plot5.mypltr’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xstandard14a.adb:258:9: 
warning: trampoline generated for nested function 
‘xstandard14a.plot5.mypltr’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xtraditional16a.adb:103:5: 
warning: trampoline generated for nested function 
‘xtraditional16a.zdefined’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xstandard16a.adb:103:5: 
warning: trampoline generated for nested function 
‘xstandard16a.zdefined’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xtraditional19a.adb:68:5: 
warning: trampoline generated for nested function 
‘xtraditional19a.map_transform’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xtraditional19a.adb:97:5: 
warning: trampoline generated for nested function 
‘xtraditional19a.mapform19’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xtraditional19a.adb:124:5: 
warning: trampoline generated for nested function 
‘xtraditional19a.geolocation_labeler’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xstandard19a.adb:68:5: 
warning: trampoline generated for nested function 
‘xstandard19a.map_transform’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xstandard19a.adb:97:5: 
warning: trampoline generated for nested function 
‘xstandard19a.mapform19’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xstandard19a.adb:124:5: 
warning: trampoline generated for nested function 
‘xstandard19a.geolocation_labeler’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xtraditional22a.adb:140:5: 
warning: trampoline generated for nested function 
‘xtraditional22a.transform’ [-Wtrampolines]
/home/orion/fedora/plplot/plplot-5.15.0/examples/ada/xstandard22a.adb:140:5: 
warning: trampoline generated for nested function 
‘xstandard22a.transform’ [-Wtrampolines]


-- 
Orion Poplawski
he/him/his  - surely the least important thing about me
IT Systems Manager                         720-772-5637
NWRA, Boulder/CoRA Office             FAX: 303-415-9702
3380 Mitchell Lane                       or...@nw...
Boulder, CO 80301                 https://www.nwra.com/