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GCC: remove `-fno-builtin` option 

Since the year dot GCC has been passed the `-fno-builtin` option, which
eliminates all compiler knowledge of the C library, even down to basic
stuff like `memcpy` or `memset`, potentially inhibiting quite a lot of
optimisations.

Remove the option to re-enable the optimisations.

There is no record in the source as to why the option is present - maybe
we'll find out by trying to remove it. If necessary, it could be
selectively turned back on for particular functions.
pull/10322/head
Kevin Bracey 2019-04-05 12:25:45 +03:00
parent 71c84e851f
commit 3caa480b04
9 changed files with 15 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/export/kds/hexiwear_cproject.tmpl
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2
tools/export/kds/k22f_cproject.tmpl
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2
tools/export/kds/k64f_cproject.tmpl
View File

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8
tools/export/lpcxpresso/lpc4088_cproject.tmpl
View File

@ -34,7 +34,7 @@
<listOptionValue builtIn="false" value="{{s}}"/>
{% endfor %}
</option>
<option id="gnu.cpp.compiler.option.other.other.1100343989" name="Other flags" superClass="gnu.cpp.compiler.option.other.other" value="-c -fmessage-length=0 -fno-builtin -ffunction-sections -fdata-sections -fno-exceptions -fno-rtti" valueType="string"/>
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{% endfor %}
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8
tools/export/lpcxpresso/lpc4088_dm_cproject.tmpl
View File

@ -34,7 +34,7 @@
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{% endfor %}
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@ -951,7 +951,7 @@
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{% endfor %}
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8
tools/export/lpcxpresso/lpc4330_m4_cproject.tmpl
View File

@ -34,7 +34,7 @@
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{% endfor %}
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@ -949,7 +949,7 @@
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{% endfor %}
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2
tools/profiles/debug.json
View File

@ -2,7 +2,7 @@
"GCC_ARM": {
"common": ["-c", "-Wall", "-Wextra",
"-Wno-unused-parameter", "-Wno-missing-field-initializers",
"-fmessage-length=0", "-fno-exceptions", "-fno-builtin",
"-fmessage-length=0", "-fno-exceptions",
"-ffunction-sections", "-fdata-sections", "-funsigned-char",
"-MMD", "-fno-delete-null-pointer-checks",
"-fomit-frame-pointer", "-O0", "-g3", "-DMBED_DEBUG",

2
tools/profiles/develop.json
View File

@ -2,7 +2,7 @@
"GCC_ARM": {
"common": ["-c", "-Wall", "-Wextra",
"-Wno-unused-parameter", "-Wno-missing-field-initializers",
"-fmessage-length=0", "-fno-exceptions", "-fno-builtin",
"-fmessage-length=0", "-fno-exceptions",
"-ffunction-sections", "-fdata-sections", "-funsigned-char",
"-MMD", "-fno-delete-null-pointer-checks",
"-fomit-frame-pointer", "-Os", "-g1", "-DMBED_TRAP_ERRORS_ENABLED=1"],

2
tools/profiles/release.json
View File

@ -2,7 +2,7 @@
"GCC_ARM": {
"common": ["-c", "-Wall", "-Wextra",
"-Wno-unused-parameter", "-Wno-missing-field-initializers",
"-fmessage-length=0", "-fno-exceptions", "-fno-builtin",
"-fmessage-length=0", "-fno-exceptions",
"-ffunction-sections", "-fdata-sections", "-funsigned-char",
"-MMD", "-fno-delete-null-pointer-checks",
"-fomit-frame-pointer", "-Os", "-DNDEBUG", "-g1"],