document that gcc 4 is not supported
PATCH 1/1 document that gcc 4 is not supported
gcc 4 is not supported for compiling kernel 2.4, and I don't see any compelling reason why kernel 2.4 should ever be adapted to gcc 4.
This patch documents this fact.
---
Documentation/Changes | 2 ++ README | 1 + init/main.c | 7 +++++++ 3 files changed, 10 insertions(+)
init/main.c renamed from init/main.c.old +7 -0
@@ -84,6 +84,13 @@#error Sorry, your GCC is too old. It builds incorrect kernels.#endif +/* +* gcc >= 4 is not supported by kernel 2.4 +*/ +#if __GNUC__ >3 +#error Sorry, your GCC is too recent for kernel 2.4 +#endif +extern char _stext, _etext;extern char *linux_banner;
README renamed from README.old +1 -0
@@ -152,6 +152,7 @@ - Make sure you have gcc 2.95.3 available. gcc 2.91.66 (egcs-1.1.2) may also work but is not as safe, and *gcc 2.7.2.3 is no longer supported*. + gcc 4 is *not* supported. Also remember to upgrade your binutils package (for as/ld/nm and company) if necessary. For more information, refer to ./Documentation/Changes.
Documentation/Changes renamed from Documentation/Changes.old +2 -0
@@ -91,6 +91,8 @@ You should ensure you use gcc-2.96-74 or later. gcc-2.96-54 will not build the kernel correctly. +gcc 4 is not supported. + In addition, please pay attention to compiler optimization. Anything greater than -O2 may not be wise. Similarly, if you choose to use gcc-2.95.x or derivatives, be sure not to use -fstrict-aliasing (which, depending on
Quoted 2 lines · Adrian Bunk
gcc 4 is not supported for compiling kernel 2.4, and I don't see any compelling reason why kernel 2.4 should ever be adapted to gcc 4.
...
Quoted 6 lines
init/main.c renamed from init/main.c.old +0
-0@@ -84,6 +84,13 @@#error Sorry, your GCC is too old. It builds incorrect kernels.#endif
init/main.c line 96
Quoted 10 lines
init/main.c renamed from init/main.c.old +7
-0+/* +* gcc >= 4 is not supported by kernel 2.4 +*/ +#if __GNUC__ >3 +#error Sorry, your GCC is too recent for kernel 2.4 +#endif +extern char _stext, _etext;extern char *linux_banner;
This is redundant. Any attempt to compile vanilla 2.4 with gcc4 will fail with compilation errors. (And except for one issue on x86-64 which actually was a kernel bug, those are the only known issues with using gcc4 for 2.4.)
OTOH, for those of us that do use gcc4, this just gets in the way and forces the gcc4 fixes kit for 2.4 to be even larger.
Since distributors won't use gcc4 for 2.4, and naive users won't succeed anyway, what's the point?
/Mikael
Quoted 10 lines · Mikael Pettersson
Quoted 2 lines · Adrian Bunk
gcc 4 is not supported for compiling kernel 2.4, and I don't see any compelling reason why kernel 2.4 should ever be adapted to gcc 4.
...
Quoted 6 lines
init/main.c renamed from init/main.c.old +0
-0@@ -84,6 +84,13 @@#error Sorry, your GCC is too old. It builds incorrect kernels.#endif
Quoted 15 lines
init/main.c line 96
Quoted 10 lines
init/main.c renamed from init/main.c.old +7
-0+/* +* gcc >= 4 is not supported by kernel 2.4 +*/ +#if __GNUC__ >3 +#error Sorry, your GCC is too recent for kernel 2.4 +#endif +extern char _stext, _etext;extern char *linux_banner;This is redundant. Any attempt to compile vanilla 2.4 with gcc4 will fail with compilation errors. (And except for one issue on x86-64 which actually was a kernel bug, those are the only known issues with using gcc4 for 2.4.)
Without this patch, your screen is flooded with warnings and errors when accidentially trying to compile kernel 2.4 with gcc 4.
With this patch, the same happens, but the last lines contain the explanation
#error Sorry, your GCC is too recent for kernel 2.4
Quoted 3 lines
OTOH, for those of us that do use gcc4, this just gets in the way and forces the gcc4 fixes kit for 2.4 to be even larger.
...
If someone makes a patch to fix all issues with gcc 4, adding the removal of this #error should be the most trivial part of the patch.
Quoted 1 line
/Mikael
cu
Adrian
Signature · 4 lines
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of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
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