mirror of
https://github.com/richfelker/musl-cross-make.git
synced 2025-04-21 08:24:58 +02:00
68 lines
2.2 KiB
Diff
68 lines
2.2 KiB
Diff
GCC 4.8.x: default to DWARF2 instead of DWARF4
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1) Dwarf4 debug info is 3-4 times bigger than Dwarf2,
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2) it only helps C++11 debugging,
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3) to be able to debug such programs, one needs bleeding edge tools like gdb 7.6.
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with older versions, there is no error message at all, only a failure to show
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the right source files (only _start/.init asm is shown).
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reversed patch from
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http://repo.or.cz/w/official-gcc.git/patch/052166fd4a8051c7dc4c87d408be091c99aafd55
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--- gcc-4.8.2.org/gcc/common.opt
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+++ gcc-4.8.2/gcc/common.opt
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@@ -977,7 +977,7 @@
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Map one directory name to another in debug information
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fdebug-types-section
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-Common Report Var(flag_debug_types_section) Init(0)
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+Common Report Var(flag_debug_types_section) Init(1)
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Output .debug_types section when using DWARF v4 debuginfo.
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; Nonzero for -fdefer-pop: don't pop args after each function call
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@@ -2307,7 +2307,7 @@
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Generate debug information in COFF format
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gdwarf-
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-Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
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+Common Joined UInteger Var(dwarf_version) Init(-1) Negative(gstabs)
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Generate debug information in DWARF v2 (or later) format
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ggdb
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@@ -2323,7 +2323,7 @@
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Generate DWARF pubnames and pubtypes sections.
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gno-record-gcc-switches
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-Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1)
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+Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(0)
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Don't record gcc command line switches in DWARF DW_AT_producer.
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grecord-gcc-switches
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@@ -2347,7 +2347,7 @@
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Generate debug information in extended STABS format
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gno-strict-dwarf
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-Common RejectNegative Var(dwarf_strict,0) Init(0)
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+Common RejectNegative Var(dwarf_strict,0) Init(-1)
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Emit DWARF additions beyond selected version
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gstrict-dwarf
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--- gcc-4.8.2.org/gcc/toplev.c
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+++ gcc-4.8.2/gcc/toplev.c
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@@ -1363,6 +1363,15 @@
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}
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}
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+ /* Unless over-ridden for the target, assume that all DWARF levels
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+ may be emitted, if DWARF2_DEBUG is selected. */
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+ if (dwarf_strict < 0)
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+ dwarf_strict = 0;
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+
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+ /* And select a default dwarf level. */
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+ if (dwarf_version < 0)
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+ dwarf_version = 2;
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+
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/* A lot of code assumes write_symbols == NO_DEBUG if the debugging
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level is 0. */
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if (debug_info_level == DINFO_LEVEL_NONE)
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