<div dir="ltr">Looks probably like a bug in GCC and best discussed in their forum? (clang seems to produce the macro in the macinfo if you compile with `-fdebug-macro` (& you have to put some emitted entity (like a function definition) in the file before Clang will produce any debug info for the file))</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Sep 11, 2024 at 11:51 AM Lorenzo Gomez via Dwarf-discuss <<a href="mailto:dwarf-discuss@lists.dwarfstd.org">dwarf-discuss@lists.dwarfstd.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u>
<div>
<p>Something else to note:</p>
<p>If I link the "test_file1.o" file with "gcc -g3 -nostartfiles
-Llib -gdwarf-4 test_file1_copy.o -o test_file1_linked_dwarf4.o"
the macro shows up in the DWARF, regardless of whether it is
defined before/after the #include.<br>
</p>
<p><br>
</p>
<div>On 9/11/24 1:47 PM, Lorenzo Gomez
wrote:<br>
</div>
<blockquote type="cite">
<p>Hi there,</p>
<p><br>
</p>
<p>I'm currently using dwarfdump "2020-01-14 10:13:32-08:00
Package Version "20200114"" to look at macros inside the DWARF.</p>
<p><br>
</p>
<p>Imagine two files; test_file1.h and test_file1.cpp<br>
</p>
<p>test_file1.cpp is defined as follows:</p>
<p><br>
</p>
<blockquote>
<p>/*<br>
* test_file.cpp<br>
*<br>
*/<br>
<br>
#ifdef __cplusplus<br>
extern "C" {<br>
#endif<br>
<br>
#include "test_file1.h"<br>
<br>
#include <fcntl.h><br>
#include <stdio.h><br>
#include <sys/stat.h><br>
#include <sys/types.h><br>
#include <unistd.h><br>
<br>
Square sq
= {};<br>
Circle ci
= {};<br>
#ifdef __cplusplus<br>
}<br>
#endif</p>
<p><br>
</p>
<p><br>
</p>
</blockquote>
<p><br>
</p>
<p><br>
</p>
<p>Here are two scenarios for the definition of test_file1.h.</p>
<p><br>
</p>
<p>Scenario #1</p>
<p> test_file.h is defined as follows:</p>
<blockquote>#include "stdint.h"<br>
<br>
#define CFE_MISSION_ES_PERF_MAX_IDS 128<br>
<br>
<br>
<br>
typedef struct CFE_ES_HousekeepingTlm_Payload<br>
{<br>
uint32_t PerfFilterMask[CFE_MISSION_ES_PERF_MAX_IDS / 32];
/**< \cfetlmmnemonic \ES_PERFFLTRMASK<br>
\brief Current Setting of Performance Analyzer Filter Masks */<br>
uint32_t PerfTriggerMask[CFE_MISSION_ES_PERF_MAX_IDS / 32];
/**< \cfetlmmnemonic \ES_PERFTRIGMASK<br>
\brief Current Setting of Performance Analyzer Trigger Masks */<br>
} CFE_ES_HousekeepingTlm_Payload_t;<br>
<br>
<br>
<br>
</blockquote>
<p>After compiling with "gcc -g3 -c -gdwarf-4 test_file1.cpp -o
test_file1_copy_dwarf4.o" and then running "dwarfdump
test_file1_dwarf4.o > dwarf4_test_file1.txt". The Macro doe
NOT show up in dwarf4_test_file1.txt. It does show up under the
debug string table but not under the "debug_macro" section.</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p>Scenario #2</p>
<p> test_file.h is defined as follows:</p>
<p> <br>
#define CFE_MISSION_ES_PERF_MAX_IDS 128</p>
<blockquote>#include "stdint.h"<br>
<br>
<br>
<br>
typedef struct CFE_ES_HousekeepingTlm_Payload<br>
{<br>
uint32_t PerfFilterMask[CFE_MISSION_ES_PERF_MAX_IDS / 32];
/**< \cfetlmmnemonic \ES_PERFFLTRMASK<br>
\brief Current Setting of Performance Analyzer Filter Masks */<br>
uint32_t PerfTriggerMask[CFE_MISSION_ES_PERF_MAX_IDS / 32];
/**< \cfetlmmnemonic \ES_PERFTRIGMASK<br>
\brief Current Setting of Performance Analyzer Trigger Masks */<br>
} CFE_ES_HousekeepingTlm_Payload_t;<br>
<br>
<br>
<br>
</blockquote>
<p>After compiling with "gcc -g3 -c -gdwarf-4 test_file1.cpp -o
test_file1_dwarf4.o" and then running "dwarfdump
test_file1_dwarf4.o > dwarf4_test_file1.txt". The Macro DOES
show up in dwarf4_test_file1.txt. It does show up under the
"debug_macro" section.</p>
<p><br>
</p>
<p>Is there a reason why in order for macros to show up they have
to be declared <i>before </i>the #include macro(s)?</p>
<p><br>
</p>
<p>Perhaps I'm missing something obvious?</p>
<p>Some more info about my system(x86 Intel CPU):</p>
<p>NAME="Pop!_OS"<br>
VERSION="20.04 LTS"<br>
ID=pop<br>
ID_LIKE="ubuntu debian"<br>
PRETTY_NAME="Pop!_OS 20.04 LTS"<br>
VERSION_ID="20.04"<br>
HOME_URL=<a href="https://pop.system76.com" target="_blank">"https://pop.system76.com"</a><br>
SUPPORT_URL=<a href="https://support.system76.com" target="_blank">"https://support.system76.com"</a><br>
BUG_REPORT_URL=<a href="https://github.com/pop-os/pop/issues" target="_blank">"https://github.com/pop-os/pop/issues"</a><br>
PRIVACY_POLICY_URL=<a href="https://system76.com/privacy" target="_blank">"https://system76.com/privacy"</a><br>
VERSION_CODENAME=focal<br>
UBUNTU_CODENAME=focal<br>
LOGO=distributor-logo-pop-os<br>
<br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p>Thanks</p>
<p>Lorenzo<br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p> <br>
</p>
<p><br>
</p>
<p> <br>
</p>
</blockquote>
</div>
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</blockquote></div>