diff options
Diffstat (limited to 'dev-libs/libsecp256k1/files/0.2.0-fix-cross-compile.patch')
| -rw-r--r-- | dev-libs/libsecp256k1/files/0.2.0-fix-cross-compile.patch | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/dev-libs/libsecp256k1/files/0.2.0-fix-cross-compile.patch b/dev-libs/libsecp256k1/files/0.2.0-fix-cross-compile.patch new file mode 100644 index 000000000000..a1db0826ebe2 --- /dev/null +++ b/dev-libs/libsecp256k1/files/0.2.0-fix-cross-compile.patch @@ -0,0 +1,87 @@ +https://github.com/bitcoin-core/secp256k1/pull/1159 + +From 772e747bd9104d80fe531bed61f23f75342d7d63 Mon Sep 17 00:00:00 2001 +From: Matt Whitlock <bitcoin@mattwhitlock.name> +Date: Sun, 20 Nov 2022 01:46:07 -0500 +Subject: [PATCH] Makefile: build precomp generators using build-system + toolchain + +When cross-compiling libsecp256k1, if the `precomputed_ecmult*.c` source +files need to be regenerated, then the generators need to be built for +the *build* system, not for the *host* system. Autoconf supports this +fairly cleanly via the `AX_PROG_CC_FOR_BUILD` macro (from Autoconf +Archive), but Automake requires some hackery. When building the +generators, we override the `CC`, `CFLAGS`, `CPPFLAGS`, and `LDFLAGS` +variables to their build-system counterparts, whose names are suffixed +with `_FOR_BUILD` and whose values are populated by the aforementioned +Autoconf macro and may be overridden on the `make` command line. Since +Automake lacks support for overriding `EXEEXT` on a per-program basis, +we define a recipe that builds the generator binaries with names +suffixed with `$(EXEEXT)` and then renames them suffixed with +`$(BUILD_EXEEXT)`. +--- + Makefile.am | 30 ++++++++++++++++++++++++------ + configure.ac | 1 + + 2 files changed, 25 insertions(+), 6 deletions(-) + +diff --git a/Makefile.am b/Makefile.am +index 30b6a794d0..e929300298 100644 +--- a/Makefile.am ++++ b/Makefile.am +@@ -180,8 +180,26 @@ endif + endif + + ### Precomputed tables +-EXTRA_PROGRAMS = precompute_ecmult precompute_ecmult_gen +-CLEANFILES = $(EXTRA_PROGRAMS) ++PROGRAMS_FOR_BUILD = precompute_ecmult precompute_ecmult_gen ++$(addsuffix $(BUILD_EXEEXT),$(PROGRAMS_FOR_BUILD)) : override CC = $(CC_FOR_BUILD) ++$(addsuffix $(BUILD_EXEEXT),$(PROGRAMS_FOR_BUILD)) : override CFLAGS = $(CFLAGS_FOR_BUILD) ++$(addsuffix $(BUILD_EXEEXT),$(PROGRAMS_FOR_BUILD)) : override CPPFLAGS = $(CPPFLAGS_FOR_BUILD) ++$(addsuffix $(BUILD_EXEEXT),$(PROGRAMS_FOR_BUILD)) : override LDFLAGS = $(LDFLAGS_FOR_BUILD) ++# Automake has no support for PROGRAMS suffixed with BUILD_EXEEXT ++# instead of EXEEXT, so if those extensions differ, then we define a ++# recipe that builds the latter and renames it to the former. Since ++# Cygwin toolchains always append '.exe' to the output file name given ++# by '-o', we ignore rename failures since the toolchain will have ++# already created the right output file. (Note: The leading spaces ++# before ifneq and endif here are a hack so Automake won't try to ++# interpret them as an Automake conditional.) ++ ifneq ($(BUILD_EXEEXT),$(EXEEXT)) ++%$(BUILD_EXEEXT) : %$(EXEEXT) ++ mv -- '$<' '$@' || : ++ endif ++ ++EXTRA_PROGRAMS = $(PROGRAMS_FOR_BUILD) ++CLEANFILES = $(addsuffix $(BUILD_EXEEXT),$(PROGRAMS_FOR_BUILD)) + + precompute_ecmult_SOURCES = src/precompute_ecmult.c + precompute_ecmult_CPPFLAGS = $(SECP_INCLUDES) +@@ -198,11 +216,11 @@ precompute_ecmult_gen_LDADD = $(SECP_LIBS) $(COMMON_LIB) + # This means that rebuilds of the prebuilt files always need to be + # forced by deleting them, e.g., by invoking `make clean-precomp`. + src/precomputed_ecmult.c: +- $(MAKE) $(AM_MAKEFLAGS) precompute_ecmult$(EXEEXT) +- ./precompute_ecmult$(EXEEXT) ++ $(MAKE) $(AM_MAKEFLAGS) precompute_ecmult$(BUILD_EXEEXT) ++ ./precompute_ecmult$(BUILD_EXEEXT) + src/precomputed_ecmult_gen.c: +- $(MAKE) $(AM_MAKEFLAGS) precompute_ecmult_gen$(EXEEXT) +- ./precompute_ecmult_gen$(EXEEXT) ++ $(MAKE) $(AM_MAKEFLAGS) precompute_ecmult_gen$(BUILD_EXEEXT) ++ ./precompute_ecmult_gen$(BUILD_EXEEXT) + + PRECOMP = src/precomputed_ecmult_gen.c src/precomputed_ecmult.c + precomp: $(PRECOMP) +diff --git a/configure.ac b/configure.ac +index a2a15d2b82..013964f5ff 100644 +--- a/configure.ac ++++ b/configure.ac +@@ -35,6 +35,7 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) + AC_PROG_CC + AM_PROG_AS + AM_PROG_AR ++AX_PROG_CC_FOR_BUILD + + # Clear some cache variables as a workaround for a bug that appears due to a bad + # interaction between AM_PROG_AR and LT_INIT when combining MSVC's archiver lib.exe. |