This is an automated email from the git hooks/post-receive script. guillem pushed a commit to branch master in repository dpkg.
View the commit online: https://git.dpkg.org/cgit/dpkg/dpkg.git/commit/?id=65d4418371f17df498027c3c414cafe6e8d0770a commit 65d4418371f17df498027c3c414cafe6e8d0770a Author: Guillem Jover <guil...@debian.org> AuthorDate: Mon May 28 02:17:02 2018 +0200 man: Clarify PIE build flag feature semantics Mention the specific .specs files being used. Reword the description to make it more clear what is going on. Closes: #900088 --- debian/changelog | 1 + man/dpkg-buildflags.man | 31 +++++++++++++++++++------------ 2 files changed, 20 insertions(+), 12 deletions(-) diff --git a/debian/changelog b/debian/changelog index bd72840b1..a5920996b 100644 --- a/debian/changelog +++ b/debian/changelog @@ -128,6 +128,7 @@ dpkg (1.19.1) UNRELEASED; urgency=medium deb-src-control(5). Prompted by Mattia Rizzolo <mat...@debian.org>. - Update git URLs for move away from alioth.debian.org. - Fix set_build_type_from_options() description in Dpkg::Build::Types. + - Clarify PIE build flag feature semantics. Closes: #900088 * Code internals: - Do not use stringy eval to define different sub implementations, just assign an anonymous sub to the typeglob. diff --git a/man/dpkg-buildflags.man b/man/dpkg-buildflags.man index a0a76ed53..7712c5576 100644 --- a/man/dpkg-buildflags.man +++ b/man/dpkg-buildflags.man @@ -390,18 +390,25 @@ above). The option cannot become enabled if \fBrelro\fP is not enabled. . .TP .B pie -This setting (with no default since dpkg 1.18.23, and injected by default -by gcc on the amd64, arm64, armel, armhf, i386, kfreebsd-amd64, kfreebsd-i386, -mips, mipsel, mips64el, ppc64el, s390x, sparc and sparc64 Debian architectures) -adds the required options via gcc specs files if -needed to enable or disable PIE. When enabled and injected by gcc, -adds nothing. When enabled and not injected by gcc, adds \fB\-fPIE\fP -to \fBCFLAGS\fP, \fBCXXFLAGS\fP, \fBOBJCFLAGS\fP, \fBOBJCXXFLAGS\fP, -\fBGCJFLAGS\fP, \fBFFLAGS\fP and \fBFCFLAGS\fP, and \fB\-fPIE \-pie\fP -to \fBLDFLAGS\fP. When disabled and injected by gcc, adds \fB\-fno\-PIE\fP -to \fBCFLAGS\fP, \fBCXXFLAGS\fP, \fBOBJCFLAGS\fP, \fBOBJCXXFLAGS\fP, -\fBGCJFLAGS\fP, \fBFFLAGS\fP and \fBFCFLAGS\fP, and -\fB\-fno\-PIE \-no\-pie\fP to \fBLDFLAGS\fP. +This setting (with no global default since dpkg 1.18.23, as it is enabled +by default now by gcc on the amd64, arm64, armel, armhf, hurd-i386, i386, +kfreebsd-amd64, kfreebsd-i386, mips, mipsel, mips64el, powerpc, ppc64, +ppc64el, riscv64, s390x, sparc and sparc64 Debian architectures) adds +the required options to enable or disable PIE via gcc specs files, if +needed, depending on whether gcc injects on that architecture the flags +by itself or not. +When the setting is enabled and gcc injects the flags, it adds nothing. +When the setting is enabled and gcc does not inject the flags, it adds +\fB\-fPIE\fP (via \fI%PKGDATADIR%/pie-compiler.specs\fP) to \fBCFLAGS\fP, +\fBCXXFLAGS\fP, \fBOBJCFLAGS\fP, \fBOBJCXXFLAGS\fP, \fBGCJFLAGS\fP, +\fBFFLAGS\fP and \fBFCFLAGS\fP, and +\fB\-fPIE \-pie\fP (via \fI%PKGDATADIR%/pie-link.specs\fP) to \fBLDFLAGS\fP. +When the setting is disabled and gcc injects the flags, it adds +\fB\-fno\-PIE\fP (via \fI%PKGDATADIR%/no-pie-compile.specs\fP) to \fBCFLAGS\fP, +\fBCXXFLAGS\fP, \fBOBJCFLAGS\fP, \fBOBJCXXFLAGS\fP, \fBGCJFLAGS\fP, +\fBFFLAGS\fP and \fBFCFLAGS\fP, and +\fB\-fno\-PIE \-no\-pie\fP (via \fI%PKGDATADIR%/no-pie-link.specs\fP) to +\fBLDFLAGS\fP. Position Independent Executable are needed to take advantage of Address Space Layout -- Dpkg.Org's dpkg
