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Improve handling of platform-specific build options (#2162)

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* Opt into POSIX functions with `_POSIX_C_SOURCE` before any system
  headers are `#include`d
* Allow user to override `make develop`'s `WARNFLAGS` and `CXXFLAGS`
* Use `make develop` on 32-bit Cygwin with sanitizers disabled
* Do not unnecessarily redefine `fseek` and `ftell`
* Disable a false-positive `-Wno-null-dereference` on 32-bit Cygwin

Co-authored-by: ISSOtm <[email protected]>
This commit is contained in:
RangiandISSOtm authored and GitHub committed 2026-09-26 16:31:25 -04:00
1 parent 43bdeb873e
commit b732f59472
23 files changed
+60 -40
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Makefile
+4 -3
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@@ -222,7 +222,7 @@ install: all
# continous integration infrastructure return failure.
# The rationale for some of the flags is documented in the CMakeLists.
develop:
$Q${MAKE} WARNFLAGS="${WARNFLAGS} -Werror -Wextra \
$Q${MAKE} WARNFLAGS="-Werror -Wextra \
-Walloc-zero -Wcast-align -Wcast-qual -Wduplicated-branches -Wduplicated-cond \
-Wfloat-equal -Wlogical-op -Wnull-dereference -Wold-style-cast -Wshift-overflow=2 \
-Wstringop-overflow=4 -Wtrampolines -Wundef -Wuninitialized -Wunused -Wshadow \
@@ -232,8 +232,9 @@ develop:
-D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC -D_GLIBCXX_SANITIZE_VECTOR \
-D_GLIBCXX_VERBOSE_ASSERT -D_GLIBCXX_EXTERN_TEMPLATE=0 \
-D_LIBCPP_DEBUG -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG \
-fsanitize=address -fsanitize=undefined -fsanitize=float-divide-by-zero" \
CXXFLAGS="-ggdb3 -Og -fno-omit-frame-pointer -fno-optimize-sibling-calls"
-fsanitize=address -fsanitize=undefined -fsanitize=float-divide-by-zero \
${WARNFLAGS}" \
CXXFLAGS="-ggdb3 -Og -fno-omit-frame-pointer -fno-optimize-sibling-calls ${CXXFLAGS}"
# Target used in development to debug with gdb.
debug: