Difference between revisions of "Building"
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m (Re-order (sort). Wiki formatting.) |
(Mention some of the patches from opensuse (lzo) and gentoo (gcc 10). Wiki formatting. Update links.) |
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<!-- --> | <!-- --> | ||
| + | * '''gcc-10''' linker failure: "''multiple definition of...''". <!-- | ||
| + | --> <p> syslinux-6.04_pre1 fails to build on gcc-10 due to {{nowrap|1=<tt>-fno-common</tt>}} change. <!-- | ||
| + | --> {{nowrap|1=<tt>gcc-10</tt>}} and above flipped a default from <!-- | ||
| + | --> {{nowrap|1=<tt>-fcommon</tt>}} to {{nowrap|1=<tt>-fno-common</tt>.}} </p> <!-- | ||
| + | --><!-- <p> This changed <tt>gcc</tt> code generator to emit globals without explicit initializer --><!-- | ||
| + | --><!-- from {{nowrap|.bss}} (via COMMON symbol type) to {{nowrap|.data}} (via DEFAULT symbol type). </p> --><!-- | ||
| + | --> <p> {{nowrap|1=<tt>gcc-10</tt>}} will reject multiple definitions of global variables. <!-- | ||
| + | --> Possible/potential <u>workaround</u>: {{nowrap|add/append}} {{nowrap|1=<tt>-f-common</tt>}} to CFLAGS. <!-- | ||
| + | --> Other workarounds and better solutions are available too. <!-- | ||
| + | --> Ideally, the code would need a few {{nowrap|1='<tt>extern</tt>'}} additions and maybe moving variable definitions. <!-- | ||
| + | --><!-- | ||
| + | --><!-- References: | ||
| + | --><!-- https://bugs.gentoo.org/705730 | ||
| + | --><!-- https://wiki.gentoo.org/wiki/Gcc_10_porting_notes/fno_common | ||
| + | --><!-- https://bugs.gentoo.org/705764 | ||
| + | --><!-- | ||
| + | --><!-- https://bugzilla.suse.com/1160244 | ||
| + | --><!-- | ||
| + | --><!-- https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html | ||
| + | --><!-- https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#index-fcommon | ||
| + | --><!-- | ||
| + | --><!-- https://gcc.gnu.org/PR85678 | ||
| + | --> </p> <!-- | ||
| + | --><!-- --> | ||
| + | * <code>internal error - lzo_init() failed!</code> (inconsistent/sporadic error) <!-- | ||
| + | --> <p> Syslinux fails to build due to aliasing bugs in lzo. <!-- | ||
| + | --> Add {{nowrap|1=<tt>-fno-strict-aliasing</tt>}} to {{nowrap|1=<tt>lzo/Makefile</tt>.}} </p> <!-- | ||
| + | --> References: | ||
| + | ** <p> [https://bugzilla.suse.com/1125616] <!-- | ||
| + | --><!-- [https://build.opensuse.org/package/view_file/system:install:head/syslinux6/18_lzo.diff?expand=1] | ||
| + | --><!-- [https://build.opensuse.org/package/view_file/openSUSE:Factory/syslinux/syslinux-4.04-lzo.diff?rev=f8bf3fec929e35b8b983d749c1f14511] | ||
| + | --> </p> <!-- | ||
| + | --><!-- --> | ||
| + | * Fix broken efi binaries with '''binutils 2.31+''' <!-- | ||
| + | --> <p> "Binutils >= 2.31 writes two PT_LOAD segements by default. <!-- | ||
| + | --> This is not supported by the <tt>wrapper.c</tt> script used to convert the shared object into an elf binary." </p> <!-- | ||
| + | --> References: | ||
| + | ** [https://salsa.debian.org/images-team/syslinux/commit/012e1dd312eb8c1f9a52239966e0be0169d7af98 "Patches from Debian"] ( Lukas Schwaighofer <!-- (irc: lus) --> ) | ||
| + | ** [https://www.syslinux.org/archives/2018-August/026168.html Discard .note.gnu.property section to fix build failure (patch)] | ||
| + | ** [https://www.syslinux.org/archives/2018-August/026167.html Patch: fix syslinux.efi (Re: Unable to get syslinux.efi to work, grub2 boots tho)] <!-- | ||
| + | --><!-- | ||
| + | --><!-- --> | ||
* If getting "'''''Not enough room for program headers'''''", try adding <!-- | * If getting "'''''Not enough room for program headers'''''", try adding <!-- | ||
--> {{nowrap|1='<tt>--no-dynamic-linker</tt>'}} to the linker command line(s). <!-- | --> {{nowrap|1='<tt>--no-dynamic-linker</tt>'}} to the linker command line(s). <!-- | ||
--> Seen with '''binutils 2.27+'''. <!-- | --> Seen with '''binutils 2.27+'''. <!-- | ||
--> There might be other / better solutions / work-around methods. <!-- | --> There might be other / better solutions / work-around methods. <!-- | ||
| − | |||
--><!-- | --><!-- | ||
| − | --><!-- References: | + | --><!-- References: |
--><!-- http://www.syslinux.org/archives/2017-February/025531.html | --><!-- http://www.syslinux.org/archives/2017-February/025531.html | ||
--><!-- http://bugs.debian.org/846679#10 | --><!-- http://bugs.debian.org/846679#10 | ||
--><!-- http://www.syslinux.org/archives/2017-April/025748.html "Cross-compilation patches" (Benoît Allard (irc: benallard)) | --><!-- http://www.syslinux.org/archives/2017-April/025748.html "Cross-compilation patches" (Benoît Allard (irc: benallard)) | ||
| + | --><!-- | ||
| + | --> <p> Note: 6.04-pre1+ should not be affected by this issue. </p> <!-- | ||
| + | --><!-- | ||
| + | --><!-- References: | ||
| + | --><!-- http://www.syslinux.org/archives/2017-October/025948.html "Patches from Debian" (Lukas Schwaighofer (irc: lus)) | ||
| + | --><!-- | ||
| + | --> <p> [[Contact|Feedback]] is appreciated. </p> <!-- | ||
| + | --><!-- | ||
--><!-- --> | --><!-- --> | ||
| − | |||
| − | |||
* When building with '''glibc 2.23+''', the "major", "minor" and "makedev" <!-- | * When building with '''glibc 2.23+''', the "major", "minor" and "makedev" <!-- | ||
--> functions are defined in {{nowrap|"<tt>sys/sysmacros.h</tt>"}}. <!-- | --> functions are defined in {{nowrap|"<tt>sys/sysmacros.h</tt>"}}. <!-- | ||
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Patches already included in Syslinux 6.04-pre1 (released 2016Mar): | Patches already included in Syslinux 6.04-pre1 (released 2016Mar): | ||
| − | * Building Syslinux 6.03 with '''gcc5+''': | + | * Building Syslinux 6.03 with '''gcc5+''': |
** [http://repo.or.cz/syslinux.git/patch/e5f2b577ded109291c9632dacb6eaa621d8a59fe?hp=8dc6d758b564a1ccc44c3ae11f265d43628219ce gcc fix alignment] | ** [http://repo.or.cz/syslinux.git/patch/e5f2b577ded109291c9632dacb6eaa621d8a59fe?hp=8dc6d758b564a1ccc44c3ae11f265d43628219ce gcc fix alignment] | ||
** [http://repo.or.cz/syslinux.git/patch/0cc9a99e560a2f52bcf052fd85b1efae35ee812f?hp=e5f2b577ded109291c9632dacb6eaa621d8a59fe don't guess sections' alignment] | ** [http://repo.or.cz/syslinux.git/patch/0cc9a99e560a2f52bcf052fd85b1efae35ee812f?hp=e5f2b577ded109291c9632dacb6eaa621d8a59fe don't guess sections' alignment] | ||
| Line 38: | Line 85: | ||
--><!-- https://bugzilla.redhat.com/show_bug.cgi?id=1135793#c21 --> <!-- | --><!-- https://bugzilla.redhat.com/show_bug.cgi?id=1135793#c21 --> <!-- | ||
--><!-- Another possibly-related commit might be [http://repo.or.cz/syslinux.git/commit/83aad4f69065509ba5b1c080edccfed316a4cff0 "correct a type"] --> <!-- | --><!-- Another possibly-related commit might be [http://repo.or.cz/syslinux.git/commit/83aad4f69065509ba5b1c080edccfed316a4cff0 "correct a type"] --> <!-- | ||
| − | --><!-- also from Scot Doyle. | + | --><!-- also from Scot Doyle. --> <!-- |
| − | + | ||
--><!-- --> | --><!-- --> | ||
| + | <!-- --> | ||
| + | |||
| + | <br /> | ||
| + | Testing Syslinux {{nowrap|6.04-pre1}} (or later) is recommended. | ||
== Other == | == Other == | ||
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--> {{nowrap|1="<code><nowiki>CFLAGS += -fno-pie</nowiki></code>"}} or <!-- | --> {{nowrap|1="<code><nowiki>CFLAGS += -fno-pie</nowiki></code>"}} or <!-- | ||
--> {{nowrap|1="<code><nowiki>CFLAGS := -fno-pie</nowiki></code>".}} <!-- | --> {{nowrap|1="<code><nowiki>CFLAGS := -fno-pie</nowiki></code>".}} <!-- | ||
| − | --> Examples: | + | --> Examples: |
<!-- ArchLinux --> | <!-- ArchLinux --> | ||
** [http://bugzilla.syslinux.org/show_bug.cgi?id=70] | ** [http://bugzilla.syslinux.org/show_bug.cgi?id=70] | ||
<!-- Ubuntu and Debian --> | <!-- Ubuntu and Debian --> | ||
** [https://bugs.launchpad.net/bugs/1579023] and <!-- | ** [https://bugs.launchpad.net/bugs/1579023] and <!-- | ||
| − | --> [https://anonscm.debian.org/git/collab-maint/syslinux.git/commit/?id=9faf103f53ba4094cdce153a223239a62aa48ac5] | + | --><!-- prior/old url: [https://anonscm.debian.org/git/collab-maint/syslinux.git/commit/?id=9faf103f53ba4094cdce153a223239a62aa48ac5] --><!-- |
| + | --> [https://salsa.debian.org/images-team/syslinux/commit/9faf103f53ba4094cdce153a223239a62aa48ac5] | ||
Latest revision as of 14:21, 15 February 2020
- gcc-10 linker failure: "multiple definition of...".
syslinux-6.04_pre1 fails to build on gcc-10 due to -fno-common change. gcc-10 and above flipped a default from -fcommon to -fno-common.
gcc-10 will reject multiple definitions of global variables. Possible/potential workaround: add/append -f-common to CFLAGS. Other workarounds and better solutions are available too. Ideally, the code would need a few 'extern' additions and maybe moving variable definitions.
-
internal error - lzo_init() failed!(inconsistent/sporadic error)Syslinux fails to build due to aliasing bugs in lzo. Add -fno-strict-aliasing to lzo/Makefile.
References: - Fix broken efi binaries with binutils 2.31+
"Binutils >= 2.31 writes two PT_LOAD segements by default. This is not supported by the wrapper.c script used to convert the shared object into an elf binary."
References: - If getting "Not enough room for program headers", try adding '--no-dynamic-linker' to the linker command line(s). Seen with binutils 2.27+. There might be other / better solutions / work-around methods.
Note: 6.04-pre1+ should not be affected by this issue.
Feedback is appreciated.
- When building with glibc 2.23+, the "major", "minor" and "makedev" functions are defined in "sys/sysmacros.h". The patch "extlinux: pull in sys/sysmacros.h for major/minor/makedev", applied to Syslinux during 2016Apr, should help. Please note that not only Syslinux is affected by this change in glibc.
Patches already included in Syslinux 6.04-pre1 (released 2016Mar):
- Building Syslinux 6.03 with gcc5+:
- Use -mno-red-zone for EFI
- Syslinux 6.03 might fail to boot in some hardware (e.g. some Chromebooks). The patch "relocate protected-mode code as intended", applied to Syslinux during 2015Apr, might help.
Testing Syslinux 6.04-pre1 (or later) is recommended.
Other
- NASM 2.11.06 has a bug which prevents Syslinux from building correctly. Use other version of NASM (e.g. 2.11.05, 2.11.08+, among others).
- binutils 2.26, as originally released upstream, has a bug preventing Syslinux from building correctly. The bug in bintuils 2.26 was resolved in a later commit.
- "error: impossible constraint in asm". When gcc5+ is configured with --enable-default-pie, in some cases there might be a need to use custom flags in some makefile(s), similar to either "
CFLAGS += -fno-pie" or "CFLAGS := -fno-pie". Examples:
